Choose the correct answer from the options given below :

• A

  (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
• B

  (A)-(I), (B)-(III), (C)-(II), (D)-(IV)
• C

  (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
• Correct answer
  D

  (A)-(IV), (B)-(III), (C)-(I), (D)-(II)

Solution

(A) $\mathrm{RCN} \xrightarrow[\text { (i) } \mathrm{H}_3 \mathrm{O}^{+}]{\text {(i) } \mathrm{SnCl}_2, \mathrm{HCl}} \mathrm{RCHO}$ Stephen reaction

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