If m,mn and mp are masses of .Z X^A nucl...

If `m,m_n` and `m_p` are masses of `._Z X^A` nucleus, neutron and proton respectively.

`m = (A - Z)m_n + Z m_p`

`m lt (A - Z)m_n + Z m_p`

`m gt (A - Z) m_n + Z m_p`

`m = (A - Z) m_p + Z m_p`

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The correct Answer is:

(b) Mass of nucleus is less than the sum of the masses of the constituent particles.

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