A single electron is removed from a neutral helium-4 (4He^4\text{He}4He) atom to form a positive ion.
Which of the points, A, B, C, or D on the graph of specific charge against nucleon number represents this helium-4 ion?
(Use: elementary charge e=1.60×10−19 Ce = 1.60 \times 10^{-19}\text{ C}e=1.60×10−19 C, mass of a nucleon mnuc=1.67×10−27 kgm_{\text{nuc}} = 1.67 \times 10^{-27}\text{ kg}mnuc=1.67×10−27 kg)
A
B
C
D