The reaction of $N,N'$-diphenylthiourea with concentrated $HCl$ upon heating is given by:
$(C_6H_5NH)_2C=S \xrightarrow{conc. HCl, Heat} A + B$
The unknown compounds $A$ and $B$ in the above reaction are:

  • A
    Phenyl mercaptan and aniline
  • B
    Thiophenol and aniline hydrochloride
  • C
    $C_6H_5-N=C=S$ and $C_6H_5NH_3^+Cl^-$
  • D
    $C_6H_5CH_2SH$ and $C_6H_5NH_3^+Cl^-$

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