Two particles $X$ and $Y$ equal charges enter a region of uniform magnetic field after being accelerated through the same potential difference and describe circular paths of radii $R_X$ and $R_Y$ respectively. The ratio of their masses is

Question

$\begin {array} {1 1} (a)\;\large\frac{R_X}{R_Y} & \quad (b)\;\bigg( \large\frac{R_X}{R_Y}\bigg)^2 \\ (c)\;\large\frac{R_Y}{R_X} & \quad (d)\;\bigg( \large\frac{R_X}{R_Y}\bigg)^{\large\frac{1}{2}} \end {array}$