By which one of the following compounds both $\mathrm{CH}_4$ and $\mathrm{CH}_3-\mathrm{CH}_3$ can be prepared in one step ?

• Correct answer
  A

  $\mathrm{CH}_3 \mathrm{I}$
• B

  $\mathrm{CH}_3 \mathrm{OH}$
• C

  $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{I}$
• D

  $\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$

Solution

$\mathrm{CH}_3 \mathrm{I}+2 \mathrm{H} \xrightarrow[\text { or } \mathrm{Zn}-\mathrm{Cu} / \mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}]{\mathrm{Zn}+\mathrm{HCl}} \underset{\text { Methane }}{\mathrm{CH}_4}+\mathrm{HI}$

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