Which of the following reactions is a Fittig reaction?

• A
  $2 CH_3Cl + 2 Na \xrightarrow[\text{dry ether}]{\Delta} C_2H_6 + 2 NaCl$
• B
  $2 C_6H_5Cl + 2 Na \xrightarrow[\text{dry ether}]{\Delta} C_6H_5-C_6H_5 + 2 NaCl$
• C
  $C_6H_5Cl + C_2H_5Cl + 2 Na \xrightarrow[\text{dry ether}]{\Delta} C_6H_5-C_2H_5 + 2 NaCl$
• D
  $CH_3Cl + C_2H_5Cl + 2 Na \xrightarrow[\text{dry ether}]{\Delta} CH_3-C_2H_5 + 2 NaCl$