Match List I (Statement) with List II (Logical equivalent) and choose the correct answer from the options given below.

List I

i.No fishes are mammals

ii.All fishes are mammals

iii.Some fishes are mammals

iv.Some mammals are not fishes

List II

a.No fishes are non-mammals

b.No mammals are fishes

c.Some mammals are non-fishes

d.Some mammals are fishes

Ai-d, ii-a, iii-c, iv-b

Bi-b, ii-c, iii-d, iv-a

Ci-b, ii-a, iii-d, iv-c ✓ Correct

Di-c, ii-b, iii-d, iv-a

Correct answer: (C) i-b, ii-a, iii-d, iv-c

Explanation

The correct pairing is i-b, ii-a, iii-d, iv-c.

No fishes are mammals converts to No mammals are fishes, so i pairs with b.

All fishes are mammals obverts to No fishes are non-mammals, so ii pairs with a.

Some fishes are mammals converts to Some mammals are fishes, so iii pairs with d.

Some mammals are not fishes obverts to Some mammals are non-fishes, so iv pairs with c.

Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.