Order of reactivity of aldehydes and ketones towards nucleophilic addition

1. A.
2. B.
3. C.
4. D.

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1. A.
   benzaldehyde $<$ acetophenone < p-nitrobenzaldehyde < p-tolualdehyde
2. B.
   acetophenone $<$ benzaldehyde < p-tolualdehyde < p-nitrobenzaldehyde
3. C.
   acetophenone $<$ p-tolualdehyde < benzaldehyde < p-nitrobenzaldehyde
4. D.
   p-nitrobenzaldehyde $<$ benzaldehyde $<$ p-tolualdehyde $<$ acetophenone

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