In a face centred cubic arrangement of A and B atoms whose A atoms are at the corner of the unit cell and B atoms at the face centered. One of the A atom is missing from one corner in unit cell. The simplest formula of compound is

Question

$(a)\;A_7B_3\qquad(b)\;AB_3\qquad(c)\;A_7B_{24}\qquad(d)\;A_4B_3$