Assertion : b c c and h c p has same packing efficiency. Reason : Both have same number of atoms per unit cell and same arrangement.

Step-by-step solution

bcc has 68 % and h c p has 74 % packing efficiency. b c c - 2 atoms per unit cell, h c p-4 atoms per unit cell In b c c , particles are present at corners and one particle is present at the centre within the body of the unit cell. In hcp, the packing gives a hexagonal pattern.