`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)` and `Q_(2)=(M_(X)-M_(Y)-2m_(e))c^(2)`
B. `Q_(1)=(M_(X)-M_(Y))c^(2)` and `Q_(2)=(M_(X)-M_(Y))c^(2)`
C. `Q_(1)=(M_(X)-M_(Y)-2m_(e))c^(2)` and `Q_(2)=(M_(X)-M_(Y)+2m_(e))c^(2)`
D. `Q_(1)=(M_(X)-M_(Y)+2m_(e))c^(2)` and `Q_(2)=(M_(X)-M_(Y)+2m_(e))c^(2)`

Answer

A

Explanation

`E=Deltamc^(2)`