Compound $\mathrm{A}$ contains $8.7\%$ Hydrogen, $74\%$ Carbon and $17.3\%$ Nitrogen. The molecular formula of the compound is, Given : Atomic masses of $\mathrm{C},\mathrm{H}$ and $\mathrm{N}$ are $12,1$ and $14$ amu respectively.

The molar mass of the compound $\mathrm{A}$ is $162 \mathrm{g}{ \mathrm{mol}}^{-1}$.

• A

  ${\mathrm{C}}_4{\mathrm{H}}_6{\mathrm{N}}_2$
• B

  ${\mathrm{C}}_2{\mathrm{H}}_3\mathrm{N}$
• C

  ${\mathrm{C}}_5{\mathrm{H}}_7\mathrm{N}$
• Correct answer
  D

  ${\mathrm{C}}_{10}{\mathrm{H}}_{14}{\mathrm{N}}_2$

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