Benzaldehyde can be prepared from

1. 
   
2. 
   
3. 
   
4. $\bigcirc-\mathrm{N}_2^{+} \mathrm{Cl}^{-}+\mathrm{H}_2 \mathrm{O} \longrightarrow$

Asked in: MHT CET Full Test 1

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