Both I and II follow. Since some doctors are engineers, and all engineers are teachers, that same group of doctor-engineers must also be teachers — giving us 'some doctors are teachers.' Because this is a two-way overlap (some doctors = some engineers = some teachers), the conclusion can also be reversed to 'some teachers are doctors.'

Only conclusion II follows. Since all plates are spoons, some spoons are definitely plates (a valid conversion of a universal statement). Conclusion I does not follow — 'No cups are plates' only excludes plates from cups; it says nothing about the other spoons that aren't plates, so we can't conclude no cups are spoons at all.

Neither conclusion follows. This is a classic trap: 'all books are journals' and 'some journals are magazines' does not guarantee that the specific journals which are magazines are the same ones that are books. Without a shared, guaranteed overlap between books and magazines, no definite conclusion about their relationship can be drawn.

Both I and II follow. Since all mangoes are fruits and all fruits are healthy, it directly follows that all mangoes are healthy (a valid chain). And since all mangoes are a subset of healthy things, it's also valid to say some healthy things are mangoes.

Only conclusion I follows. Since some students are athletes, and no athletes are lazy, those particular students (who are athletes) are definitely not lazy — giving 'some students are not lazy.' Conclusion II is too strong an overreach, because it claims this about ALL students, when we only have information about the subset who are athletes.

Both I and II follow. All roses being flowers, and all flowers fading, chains together to mean all roses fade (conclusion I). Since roses form a subset of things that fade, it is also valid to say some things that fade are roses (conclusion II, a simple conversion).

Only conclusion II follows. Since some tablets are laptops, and no mobile phones are tablets, at least those tablet-laptops are proven to not be mobile phones, so 'some laptops are not mobile phones' is valid. Conclusion I is too broad — we only know about the tablets that are laptops, not about all laptops, so we can't rule out mobile phones from every laptop.

Neither conclusion follows. Even though all actors are singers, we only know 'some' singers are dancers — there's no guarantee that the singer-dancers overlap with the singer-actors. This is a frequent trap where two 'some' or mixed 'all/some' statements don't guarantee any relationship between the outer categories.

Only conclusion I follows. Since all chairs are tables, and no tables are cupboards, it follows that no chairs can be cupboards either (a valid chain of exclusion). Conclusion II directly contradicts this and cannot be true, since chairs and cupboards have been shown to be completely separate groups.

Only conclusion I follows. Since some pilots are captains, and all captains are officers, those pilot-captains must be officers too, giving 'some pilots are officers.' Conclusion II is an invalid overreach — the statement never says all officers are pilots, only that captains (a subset) are officers.

Neither conclusion follows. This is the same trap pattern as 'all-some' combinations: knowing all keys are locks and only some locks are doors doesn't guarantee that the lock-doors and the lock-keys are the same locks. No definite relationship between keys and doors can be established.

Only conclusion I follows. Since all oranges are citrus fruits, and no apples are oranges, those orange-citrus fruits are definitely not apples, supporting 'some citrus fruits are not apples.' Conclusion II is invalid overreach — we only know apples aren't oranges, not that apples can't belong to citrus fruits through some other route.

Both I and II follow. This is a straightforward valid chain: all laptops → all computers → all electronic devices means all laptops are electronic devices (I). Since laptops form part of this larger 'electronic devices' group, it's also valid to say some electronic devices are laptops (II).

Neither conclusion follows. Two 'some' statements chained together don't guarantee any fixed relationship between the outer groups — the writers who are teachers may not be the same writers who are poets. Both a definite 'some are' and a definite 'none are' claim go beyond what the statements actually establish.

Neither conclusion follows. Even though all soldiers are brave, the statement only says 'some' brave people are leaders — there's no guarantee these leader-brave-people include any soldiers specifically. This is the same all-then-some trap that frequently appears in interview reasoning tests.

Both I and II follow. Since all whales are mammals and no fish are mammals, it follows that no fish can be whales either (a valid chain of exclusion, conclusion I). Also, since whales are mammals but never fish, at least some mammals (the whales) are proven not to be fish, supporting conclusion II.

Neither conclusion follows. Even though all rivers are water bodies, we only know 'some' water bodies are polluted — there's no guarantee the polluted ones are rivers specifically, so conclusion I is unproven. Conclusion II is also invalid, since the statement never claims water bodies are limited to rivers alone.

Both I and II follow, based purely on the logical structure of the statement — even though the real-world shapes described are geometrically impossible. In these questions, conclusions must be judged only on logical validity, not real-world truth: if all circles are squares and all squares are triangles, it logically follows that all circles are triangles (I), and therefore some triangles are circles (II).

Only conclusion I follows. Since some employees are managers, and all managers work overtime, those employee-managers are proven to work overtime, giving 'some employees work overtime.' Conclusion II is an unjustified overreach — the statement never claims that every employee, only managers, works overtime.