Assertion:  $-N{H}_2$ group is less ring activating than $-NHCOC{H}_3$  group 
Reason: Because in  $-NHCOC{H}_3$  the lone pair on N atom is conjugated not only with benzene nucleus but also with  $>C=O$  group called cross-conjugation.

If both assertion and reasons are CORRECT, but reason is NOT the CORRECT explanation of the assertion.

If assertion is INCORRECT, but reason is correct

If both assertion and reasons are CORRECT, and reason is the CORRECT explanation of the assertion

If assertion is CORRECT, but reason is INCORRECT