Assertion :The close packing of atoms in cubic structure is in the order `fcc gt bcc gt sc`
Reason: Packing density`= ("Volume of unit cell")/(a^(3))`
A. If both assertion and reason are true and the reason is the correct explanation of the assertion
B. If both assertion and reason are true but reason is not the correct explanation of the assertion
C. If assertion is true bur reason is false
D. If assertion is false bur reason is true
