Question

In each of the questions below four statements are given, followed by four conclusions numbered I, II. III and IV. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

Statements
Some birds are goats.
Some goats are horses.
Some horses are lions.
Some lions are tigers.

Conclusion
I. Some tigers are goats.
II. No tiger is a goat.
III. Some lions are birds.
IV. No lion is a bird.

• A. Only either I or II follows
• B. Only either III or IV follows
• C. Only either I or II and either III or IV follow
• D. Only I and II follow
• E. None of these

Answer 1

The correct option is C Only either I or II and either III or IV follow

All the four premises are particular affirmative (I-type).
No conclusion follows from the two particular premises.
Conclusion I and II form a complementary pair. Therefore, either conclusion I or II follows.
Similarly, conclusions III and IV form a complementary pair. Therefore, either conclusion III or IV follows.