Match the features observed in castings listed in Group I with...

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Match the features observed in castings listed in Group I with the most appropriate reasons listed in Group II.

Group I Group II

P. Macrosegregation 1. Inoculation

Q. Fine grained structure 2. Gas evolution and shrinkage

R. Porosity 3. Temperature gradients and supercooling

S. dendrites 4. Density difference and convection currents

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

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

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

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

Answer: Option B

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Group I	Group II
P. Macrosegregation	1. Inoculation
Q. Fine grained structure	2. Gas evolution and shrinkage
R. Porosity	3. Temperature gradients and supercooling
S. dendrites	4. Density difference and convection currents