Reaction of formaldehyde and ammonia gives

Given below are two statements:
Statement $I$: $H_2N-CO-CH_2-CH_2-CO-CH_3$ under Clemmensen reduction conditions will give $HOOC-(CH_2)_3-CH_3$.
Statement $II$: $CH_3-CH(CH_3)-CH_2-CH(Cl)-CO-CH_3$ under Wolff-Kishner reduction conditions will give $CH_3-CH(CH_3)-CH_2-CH(Cl)-CH_2-CH_3$.
In the light of the above statements,choose the correct answer from the options given below:

The compound obtained when acetaldehyde reacts with dilute aqueous sodium hydroxide exhibits

$CH_3-CH_2-CHO \xrightarrow{Red\,P + HI} A$. Product $A$ is:

For $C_6H_5CHO$,which of the following is incorrect?

Which of the following does not give an aldol reaction with dil. $NaOH$?