In the following sequence of the reations, what is $D$?

(image) $\xrightarrow{{[O]}}A\xrightarrow{{SOC{l_2}}}B\xrightarrow{{Na{N_3}}}C\xrightarrow{{Heat}}D$

  • A
    Primary amine
  • B
    An amide
  • C
    Phenyl isocyanate
  • D
    A chain lengthened hydrocarbon
AIIMS 2007, Difficult
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