question_answer

\[{{M}_{P}}\] and \[{{M}_{N}}\] are masses of proton and neutron, respectively, at rest. If they combine to form deuterium nucleus. The mass of the nucleus will be:

A)  less than \[{{M}_{P}}\]

B)         less than \[({{M}_{P}}+{{M}_{N}})\]

C)         less than \[({{M}_{P}}+2{{M}_{N}})\]

D)         greater than \[({{M}_{P}}+2{{M}_{N}})\]