$(EtO)_2CH-CHO + CH_3MgI \xrightarrow{H_3O^{+}} (A)$. The product obtained in the above reaction is:

Identify the major product $P$ in the following reaction:
$1,3-\text{cyclohexanedione} + Cl-CH_2-CHO \xrightarrow{\text{aq. NaOH}} P$

Which of the following compounds will not undergo tautomerism?

The product of which of the following reactions forms a reddish brown precipitate when subjected to Fehling's test?

Given below are two statements:
Statement $I$: $2, 6$-diethylcyclohexanone and $6$-methyl-$2$-$n$-propylcyclohexanone are metamers.
Statement $II$: $2, 2, 6, 6$-tetramethylcyclohexanone exhibits keto-enol tautomerism.

The product $(C)$ of the reaction is: