A fair die is tossed until a number greater than 4 appears. The probability that an even number of tosses shall be required is

Question

$\begin {array} {1 1} (A)\;\large\frac{1}{2} & \quad (B)\;\large\frac{3}{5} \\ (C)\;\large\frac{1}{5} & \quad (D)\;\large\frac{2}{3} \end {array}$