NEET Physics Nuclei Questions Solved

If an electron and a positron annihiliate, then the energy released is 
(a) $3.2\times {10}^{-13} \mathrm{J}$        (b) $1.6\times {10}^{-13} \mathrm{J}$
(c) $4.8\times {10}^{-13} \mathrm{J}$           (d)  $6.4\times {10}^{-13} \mathrm{J}$