Find the mass defect of the Helium - 4 nucleus.
Given mass of the helium nucleus MHE = 4.0015084 u
Mass of a proton mp = 1.007276 u
Mass of a neutron mn = 1.008665 u

A 0.30374 u
B 0.030374 u
C 0.030384 u
D 0.03074 u