Assertion (A): A narrow glass tube when immersed into mercury causes capillary depression, and when immersed into water causes capillary rise.
Reason(R): Mercury denser than water
a. Both A and R are individually true and R is the correct explanation of A.
b. Both A and R are individually true but R is not the correct explanation of A.
c. A is true but R is false
d. A is false but R is true