The correct match between Item -1 (starting material) and Item II (reagent) for the preparation of benzaldehyde is: Item I Item II I. Benzene P. HCl andSnCl2,H3O+ II. Benzonitrile Q. H2,Pd−BaSO4,S &Quinoline III. Benzoyl chloride R. CO, HCl and AlCl3

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I−Q,II−R and III−P

I−R,II−P and III−Q

I−R,II−Q and III−P

I−P,II−Q and III−R

answer is B.

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Detailed Solution

The reactions are

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