Which of the following points is the likely position of the center of mass of the system shown in the figure?

1. $A$
2. $B$
3. $C$
4. $D$

In the $\mathrm{HCl}$ molecule, the separation between the nuclei of the two atoms is about $1.27~\mathring{\text A}~(1~\mathring{\text A}=10^{10}~\text m).$ Then the approximate location of the CM of the molecule is:
(Given that a chlorine atom is about $35.5$ times as massive as a hydrogen atom and nearly all the mass of an atom is concentrated in its nucleus).