The product obtained by heating $(NH_4)_2SO_4$ and $KCNO$ is

Compound $A$ $(C_{11}H_{14}O_4)$ is a degradation product of the antibiotic vermiculine. It undergoes the following reactions as shown in the image. Identify the unknown compound $C$ $(C_{11}H_{18}O_2)$.

Total number of enol forms possible for the compound formed during the given reaction will be (including stereoisomers):
$CH_3MgBr + CH_3CH_2COCl \to$

Natural petroleum contains

The product$(s)$ from the above reaction will be

The major product of the given reaction is: