The mass of an electron is about $\frac{1}{2000}$ times that of a proton.

The correct option is A True

Mass of electron and proton:

• The charge on the electron is$1.6\times {10}^{-19}\mathrm{coulombs}$ the smallest measurable quantity of charge and is called one unit.
• The mass of the electron $9.11\times {10}^{-28}\mathrm{g}$, is nearly $\frac{1}{1837}$th of that of the hydrogen atom.
• The charge on the proton is found to be the same as that on the electron i.e $1.6\times {10}^{-19}\mathrm{coulombs}$ or one unit.
• The mass of the proton $1.67\times {10}^{-24}\mathrm{g}$is approximately 2000 times the mass of an electron.​

Therefore, the given statement is true.