Statements: Some stars are birds.
No birds are elephants.
Conclusions: I Some stars are not elephants.
II All stars are elephants.
III Some elephants are not stars.
IV. All elephants are stars.

Options

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

Answer

D

Explanation

Some stars are birds + No birds are elephants=1+E=O. Hence .. Some stars are not elephants" follows. Again, III and IV make a complamentary. pair [O-A type). Hence, one of them must be true.