`M_(x) and M_(y)` denote the atomic masses of the parent and the daughter nuclei respectively in a radioactive decay. The Q - value for a `beta-` decay is `Q_(1)` and that for a `beta^(+)` decay is `Q_(2)`. If `m_(e)` denotes the mass of an electrons, then which of the following statements is correct?

Options

A. `Q_(1) = (M_(x) - M_(y))C^(2) " " Q_(2) = (m_(x) - M_(y) -2m_(e))C^(2)`
B. `Q_(1) = (M_(x) - M_(y))C^(2) " " Q_(2) = (m_(x) - M_(y) )C^(2)`
C. `Q_(1) = (M_(x) - M_(y) - 2m_(c ))C^(2) " " Q_(2) = (m_(x) - M_(y) +2m_(e))C^(2)`
D. `Q_(1) = (M_(x) - M_(y) + 2m_(c ))C^(2) " " Q_(2) = (m_(x) - M_(y) -2m_(e))C^(2)`

Answer

A