question_answer

Direction: In the following question three or four statements are given followed by two or three Conclusions I, II and III. You have to consider the statements to be true, even if it seems to be at variance from commonly known facts. You are to decide which of the given conclusions can definitely be drawn from the given statements Indicate your answer.

Statements

Some fishes are crocodiles

Some crocodiles are snakes

No snake is snail

All snails are tortoises

Conclusions:

I. Some snakes are fish

II. Some fishes are tortoise

A)  Conclusion II follows

B)  Both the Conclusions I and II follow

C)  None of these Conclusions I and II follows

D)  Conclusion I follows                        

Correct Answer: C

Solution :

 First and second Premises are Particular Affirmative (I - type). Third Premise Is Universal Negative (E - type). Fourth Premise is Universal Affirmative (A- type).                         \[I+E\Rightarrow O-\]type of Conclusion "Some crocodiles are not snails".             \[E+A\Rightarrow {{O}_{1}}-\]type of Conclusion "Some tortoises are not snakes".