Mx and My denote the atomic masses of the parent and the daughter nuclei respectively in a radioactive decay. The Q-value for a β – decay is Q1 and that for a β + decay is Q2. If me denotes the mass of an electron, then which of the following statements is correct?
(a) Q1 = (Mx – My) c2 and Q2 = (Mx – My – 2me)c2
(b) Q1 = (Mx – My) c2 and Q2 = (Mx – My )c2
(c) Q1 = (Mx – My – 2me) c2 and Q2 = (Mx – My +2 me)c2
(d) Q1 = (Mx – My + 2me) c2 and Q2 = (Mx – My +2 me)c2