Read the given statements and conclusions carefully. You have to take the given statements to be true if they seem to be at variance from commonly known facts and decide which conclusion(s) logically follow(s) from the given statements.

statements:

I. All fishes are birds.

II. All birds are animals.

Conclusions:

(I) All animals are fishes

(II) Some birds are fishes. 

I. All fishes are birds.

II. All birds are animals.

From the given statement the venn diagram is: 

(I) All animals are fishes  (False From the statements, we know all fishes are birds, and all birds are animals. However, it is not stated or implied that all animals are fishes)

(II) Some birds are fishes.(True, From statement I, all fishes are birds. This implies that fishes form a subset of birds,)

Thus, correct option is (b).