In the reaction sequence $Y$ is $\mathrm{CH}_3 \mathrm{CO}_2 \mathrm{H} \xrightarrow[\text { (2) } \Delta]{\text { (1) } \mathrm{NH}_3} \mathrm{P} \xrightarrow{\mathrm{Br}_2 / \mathrm{NaOH}} \mathrm{Y}$

• A

  a primary amine with same number of carbons as in P
• Correct answer
  B

  a primary amine with one carbon less than in P
• C

  a secondary amine with same number of carbons as in P
• D

  a secondary amine with one carbon less than in P

Hence, the correct answer is option: 'B'.