Assertion : The alternating current lags behind the e.m.f. by a phase angle of π/2. when AC flows through an inductor.
Reason : The inductive reactance increases as the frequency of AC source decreases.
(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 correct explanation of A
(c) A is true but R is false
(d) A and R are false