Match the following.

Group 1	Group 2
P. Grain refinement of aluminium	1. Magnesium
Q. Improvement of fluidity of cast iron	2. Titanium
R. Refinement of graphite flakes in cast iron	3. Phosphorous
S. Removal of dissolved hydrogen from molten aluminium	4. Ferro-silicon
	5. Chlorine

A. P-2, Q-3, R-4, S-5

B. P-4, Q-3, R-1, S-2

C. P-2, Q-4, R-1, S-5

D. P-3, Q-5, R-4, S-2

Answer: Option A