Which reagents are required for one step conversion of Chlorobenzene to Diphenyl?

Which reagents are required for one step conversion of Chlorobenzene to Diphenyl?
(A) Chlorobenzene, Na, Dry ether
(B) Benzene, Anhydrous AlCl3
(C) Chlorobenzene/Fe, Dark
(D) NaNO2 + HCl

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