An organic compound $\mathrm{A}$ on treatment with benzene sulfonyl chloride gives compound $\mathrm{B}$. $\mathrm{B}$ is soluble in dil. $\mathrm{NaOH}$ solution. Compound $\mathrm{A}$ is :

• A

  ${\mathrm{C}}_6{\mathrm{H}}_5-\mathrm{N}{\left({\mathrm{CH}}_3\right)}_2$
• B

  ${\mathrm{C}}_6{\mathrm{H}}_5-{\mathrm{NHCH}}_2{\mathrm{CH}}_3$
   
• C

  ${\mathrm{C}}_6{\mathrm{H}}_5-{\mathrm{CH}}_2{\mathrm{NHCH}}_3$
• Correct answer
  D

  

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