Match the following

P. Nickel-silvers	1. Alloys of tin, antimony and copper used as a bearing material
Q. Nitralloys	2. Steel used for nitriding containing aluminium, chromium and molybed num
R. Babbits	3. Soft magnetic material used as electromagnet
S. Permalloy	4. Ternery alloys of copper, nickel and zinc with good cold formability

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

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

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

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

Answer: Option B