Question

In each of the questions below are given three statements 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 all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

Statements
Some tigers are goats.
No goat is a rat.
All dogs are rats.

Conclusions
I. No tiger is a rat.
II. No dog is a goat.
III. Some dogs are tigers.
IV. Some rats are tigers.

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

Answer 1

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

Mediate term of the following statement is
All dogs are rats (A-type)
No rat is a goat (E-type) $A+E\to Etype$
No dog is goat (Conclusion II follows)
Conclusion I and IV are a complementary pair.

Only either I or IV and II follow.