Acetanilide is less basic than aniline.
Acetylation of aniline results in a decrease of electron density on nitrogen.

a. Both the assertion and reason are true, and the reason is the correct explanation of the assertion.
b. Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.
c. The assertion is true, but the reason is false.
d. The assertion is false, but the reason is true.