Match List I with List II

	List - I (Polymer)		List - II (Nature)
(A)		(I)	Thermosetting polymer
(B)		(II)	Fibers
(C)		(III)	Elastomer
(D)		(IV)	Thermoplastic polymer

Choose the correct answer from the options given below :

Two statements in respect of drug-enzyme interaction are given below

Statement I : Action of an enzyme can be blocked only when an inhibitor blocks the active site of the enzyme.

Statement II : An inhibitor can form a strong covalent bond with the enzyme.

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

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

Assertion A : Thin layer chromatography is an adsorption chromatography.

Reason R : A thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent.

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

The formulas of A and B for the following reaction sequence

are