Assertion: Special functions such as trigonometric, logarithmic and exponential functions are not dimensionless.
Reason: A pure number, ratio of similar physical quantities, such as angle and refractive index, has some dimensions.
Options:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false and R is also false.