Arrange the following processes in INCREASING magnitude of surface roughness of the casting

Q. Arrange the following processes in INCREASING magnitude of surface roughness of the casting.

P. Investment casting

Q. Permanent mould casting

R. Pressure die casting

S. Sand casting

(A) R < S < Q < P     

(B) P < S < Q < R     

(C) R < P < Q < S      

(D) Q < P < R < S

Ans: R < P < Q < S