Group I lists spectroscopic methods and Group II lists bimolecular applications of these methods. Match the methods in Group I with the applications in Group II.

Group I	Group II
P. Infrared	1. Identification of functional groups
Q. Circular Dichroism	2. Determination of secondary structure
R. Nuclear Magnetic Resonance	3. Estimation of molecular weight
	4. Determination of 3-D structure

A. P-4, Q-3, R-1

B. P-2, Q-1, R-3

C. P-1, Q-2, R-4

D. P-3, Q-2, R-4

Answer: Option C