A and B throw a dice each. The probability that A's throw is not greater than B's throw is

Question

$\begin {array} {1 1} (A)\;\large\frac{7}{12} & \quad (B)\;\large\frac{5}{12} \\ (C)\;\large\frac{1}{6} & \quad (D)\;\large\frac{1}{2} \end {array}$