Reaction by which benzaldehyde cannot be prepared is :

Options

A. + `H_(2)` in presence of Pd -`BaSO_(4)`
B. + CO + HCl in presence of anhydroud `AlCl_(3)`
C. + Zn/Hg and conc. HCl
D. `+CrO_(2)Cl_(2)` in `CS_(2)` followed by `H_(3)O^(+)`

Answer

C

Explanation

In (3) option the give reaction will not yield benzaldehyde.