Verified answer

2CH4-> C2H2 + 3H2 (to,xt)

3C2H2 -> C6H6 (th,to,xt)

C6H6 + Cl2 -> C6H5Cl + HCl (xt)

C6H5Cl + 2NaOH -> C6H5ONa + NaCl + H2O (xt,to,p)

C6H5ONa + CO2 + H2O -> C6H5OH + NaHCO3

C2h2 C6h6