(A) Led, tin and bismuth are purified by liquation method.
(R ) Lead, tin and bismuth have low m.p. as compared to impuriites.
A. If both (A) and (R ) are correct and (R ) is the correct explantion of (A )
B. If both (A) and (R ) are correct and (R ) is not the correct explantion of (A )
C. If (A) is correct but (R ) is incorrect
D. If (A) is incorrect but (R ) is correct
