$RN{H_2}$ reacts with ${C_6}{H_5}S{O_2}Cl$ in aqueous $KOH$ to give a clear solution. On acidification a precipitate is obtained which is due to the formation of
  • A$R - \mathop {\mathop {{N^ + }}\limits_{|\,\,\,\,}^{|\,\,\,\,} }\limits_{H\,\,\,}^{H\,\,} - S{O_2}{C_6}{H_5}O{H^ - }$
  • B$R - {N^ - }S{O_2}{C_6}{H_5}{K^ + }$
  • C$R - NHS{O_2}{C_6}{H_5}$
  • D${C_6}{H_5}S{O_2}N{H_2}$
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