Assertion (A): Energy efficient bulbs like CFL must be used to save electric energy.
Reason (R): CFL bulbs are costlier than ordinary bulbs, hence using ordinary bulbs can save our money.
(a) Both assertion and reason are true and reason is correct explanation of assertion.
(b) Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
(c) Assertion is true but Reason is false.
(d) Both Assertion and Reason are false.