Assertion (A): The person with diabetes insipidus feels thirsty. Reason (R): A person with diabetes insipidus suffers from excess secretion of vasopressin.

(a)

A is true but R is false

(b)

Both A and R are individually true and R is the correct explanation of A

(c)

A is false but R is true

(d)

A is false but R is true