Identify \(Z\) in the reaction :

• A

  \(R \mathrm{COX} /\) Anhydrous \(\mathrm{AlCl}_3\)
• Correct answer
  B

  \(R X / \mathrm{Na} / \mathrm{dry}\left(\mathrm{C}_2 \mathrm{H}_5\right)_2 \mathrm{O}\)
• C

  \(\mathrm{Na} /\) dry \(\left(\mathrm{C}_2 \mathrm{H}_5\right)_2 \mathrm{O}\)
• D

  \(R \mathrm{COX} / \mathrm{FeCl}_3\)

Solution

This reaction is known as Wurtz-Fittig reaction where the alkyl halide reacts with aryl halide with sodium in pressure of dry ether.

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