If a is the length of the side of a cube, the distance between the body centered atom and one corner atom in the cube will be (AIPMT 2014)

In the BCC structure: 3 4 3 2 2 r a r a 2r represents the distance between the BCC atom and one corner atom. Thus it represents the length of the side of a cube, the distance between the BCC and one corner atom of cube will be 3 2 a Hence the correct answer is option (d)