Question

If the statements “All chickens are birds”, “Some chickens are hens” and “Female birds lay eggs”, are all facts, then which of the following must also be a fact?

I. All birds lay eggs

II. Some hens are birds

III. Some chickens are not hens

1. I and II
2. II and III
3. I and III 
4. Neither I nor II nor III

Answer 1

Correct Answer - Option 2 : II and III

Given,

I. All birds lay eggs → False (“Female birds lay eggs")

II. Some hens are birds → True (Some chickens are hens)

III.Some chickens are not hens → True (Some chickens are hens so rest of the chickens are not hens)

Hence, 'II and III' is the correct answer.