Aniline reacts with acetaldehyde to form

Which of the following does not have intermolecular hydrogen bonding?

Among the following,the strongest nucleophile is

Starting from propanoic acid,the following reactions were carried out: $CH_3-CH_2-COOH$ $\xrightarrow{SOCl_2} X$ $\xrightarrow{NH_3} Y$ $\xrightarrow{Br_2 + KOH} Z$. What is the compound $Z$?

Product $(B)$ in this reaction is

Acetanilide can be prepared from aniline and which of the following?