The charge on an electron is:
A. $1C$
B. $+1.6\times {{10}^{-19}}C$
C. $-1.6\times {{10}^{-19}}C$
D. $6.25\times {{10}^{18}}C$

Hint: Study about the charges and their properties. Study how they work. Learn about the electrons as subatomic particles and their properties.

Complete step-by-step answer:
Electric charge is a basic property of matter carried by the elementary particle by which the matter is formed. It governs how the particles are affected by an electric field or magnetic field.
Electric charge can be either positive or negative. Electric charge is a discrete quantity. We don’t get any charge but we have an integral multiple of a quantity. Charges can neither be destroyed or nor can be created. It is a conserved quantity.
Opposite charges attract each other while two same charges will repel each other. i.e. if we have two positive charges or two negative charges around each other they will repel each other and if we have one positive charge and one negative charge around each other they will attract each other.
Electron is a subatomic particle with the symbol ${{e}^{-}}$. It has a negative charge with the value
${{e}^{-}}=-1.6\times {{10}^{-19}}C$
The correct option is (c).

Note: We have positive and negative charges. Every particle is naturally neutral because it has equal number of positive and negative charges i.e. equal number of proton and electrons where the proton is a positively charged particle with its value $p=+1.6\times {{10}^{-19}}C$.
We also have a neutral subatomic particle with zero charge. It is neither positive nor negative. This subatomic particle is called neutron.