Which premitive unit cell has unequal edge length `(a != b != c)` and all axial angles different from `90^(º)`?

Which premitive unit cell has unequual edge lengths (anebnec) and all axial angles different from 90^(@) ?

Which premitive unit cell has unequual edge lengths (anebnec) and all axial angles different from 90^(@) ?

CsCl has bcc arrangement, its unit cell edge length is 400pm, its inter atomic distance is

Which of the crystal systems has all the axial angles equal but not equal to 90^(@) ?

An element has bcc studture with unit cell edge length of 288 pm. How many unit cells and no. of atoms are present in 200 cm^3 of element?