NEET Physics Nuclei Questions Solved

If M $\left(A,Z\right), M_{p }and M_n$denote the masses of the nucleus ${}_Z{}^{A}X$, proton and neutron respectively in units of u $\left(1 u=931.5 MeV/c^2\right)$ and BE represnts its binding energy in MeV, then 

(a) M(A,Z)=Z$M_p+\left(A-Z\right)M_n-BE/c^2$
(b) M(A,Z)=Z$M_p+\left(A-Z\right)M_n+BE$

(c) $M(A,Z)=Z{M}_p+\left(A-Z\right)M_n-BE$

(d) M(A,Z)=Z$M_p+\left(A-Z\right)M_n+BE/c^2$