Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R :

Assertion A : Acetal / Ketal is stable in basic medium.

Reason R : The high leaving tendency of alkoxide ion gives the stability to acetal/ketal in basic medium.

In the light of the above statements, choose the correct answer from the options given below :

Given below are two statements :

In the light of the above statements, choose the correct answer from the options given below:

'R' formed in the following sequence of reactions is :

Compound (X) undergoes following sequence of reactions to give the Lactone (Y).