The correct option is (B) 28.4 MeV.
Explanation:
Binding energy in amu = Δm = [mrZ + mn(A – Z)] – M
Helium nucleus contains 2 neutron and 2 protons.
∴ Δm = [2 × 1.0087 + 2 × 1.0073] – 4.0015
= 0.0305 amu
Binding energy E = Δm in amu × 931 MeV
= 0.0305 × 931
∴ E = 28.39 MeV.