Match the techniques in Group I with their applications in Group II for protein analysis
| Group I | Group II |
| (P) Nuclear magnetic resonance spectroscopy | (1) Proximity between specific sites |
| (Q) Fluorescence resonance energy transfer | (2) Concentration |
| (R) Ultraviolet absorption spectroscopy | (3) Size |
| (S) Dynamic light scattering | (4) Structure |
1
P-3, Q-1, R-2, S-4
2
P-4, Q-1, R-2, S-3
3
P-2, Q-1, R-4, S-3
4
P-3, Q-4, R-1, S-2