Chemical properties of aldehydes and ketones -
Undergo nucleophilic addition reactions at carbon-oxygen double bond, hybridization of carbon changes from sp2 to sp3. Aldehydes are more reactive than ketones due to steric hindrance and +I effect of an alkyl group.
-
Alcohol formation by reduction of Ketones -
Yields secondary alcohol
- wherein

It is cross Aldol condensation
Therefore, option(1) is correct.
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