Each of these questions has an Assertion (1) and a Reason (R).
Assertion (1) A salt water fish drinks sea water whereas a fresh water fish never drinks water.
Reason (R) A salt water fish is hypertonic to its environment while a fresh water fish is not hypertonic to its environment.

Options

A. If both 'A' and 'R' are true and 'R' is not the correct explaination of 'A'
B. If both 'A' and 'R' are true but 'R' is not the correct explaination of 'A'
C. If 'A' is true but 'R' is false
D. If 'A' is false but 'R' is true