(A) Ethanamide $\left({\text{CH}}_{\text{3}}{\text{CONH}}_{\text{2}}\right)$  undergoes dehydration by heating with  ${\text{P}}_{\text{2}}{\text{O}}_{\text{5}}$.
(R) Ethanamide undergoes dehydration give nitro compound.

[A] is correct and [R] is incorrect

[A] is correct and [R] is correct explanation of [A]

[A] is correct and [R] is not correct explanation of [A]

Both [A] & [R] are incorrect