A man is known to speak truth 3 out of 4 times. He throws a die and reports that it is 6. The probability that it is actually a 6 is

Question

$\begin {array} {1 1} (A)\;\large\frac{1}{18} & \quad (B)\;\large\frac{1}{4} \\ (C)\;\large\frac{3}{8} & \quad (D)\;\large\frac{1}{2} \end {array}$