A molecule $A_2B$(mol.weight = 166.4) occupies triclinic lattice with a = 5A , b = 8A and C = 4A . If density of $AB_2$ is $5.2g cm^{-3}$. Calculate the number of molecules present in one unit cell.

Question

$(a)\;1\qquad(b)\;2\qquad(c)\;3\qquad(d)\;4$