$P h C O O H D I B A L H - ----- \to$

P h C H O

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P h O

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P h C H_{2} O H

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None of these

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Solution

The correct option is A $P h C H O$
Benzoic acid on reduction with di-isobutyl aluminium hydride (DIBALH) gives benzaldehyde.
$P h C O O H D I B A L H - ----- \to P h C H O$
Di-isobutyl aluminium hydride (DIBALH) is a reducing agent. It reduces carboxylic acids to aldehydes.

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