Assertion: All birds, except the ones like koel (cuckoo) build nests for retiring and taking rest during night time (day time for nocturnal).

Reason: Koel lays its eggs in the nests of tailor bird.

(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

(c) If the Assertion is correct but Reason is incorrect.

(d) If both the Assertion and Reason are incorrect.

(e) If the Assertion is incorrect but the Reason is correct.