Correct Answer: C
Explanation:
In 1916, G. N. Lewis introduced the electron pair bond.
In chemistry, an electron pair or a Lewis pair consists of two electrons that occupy the same orbital but have opposite spins.
He proposed that two atoms may share from one to six electrons forming single, double or triple bonds.
He introduced the cubical atom and six postulates to understand their chemical behaviour.
That chemical bond decides the properties of molecules such as colour, reactivity, solubility, etc. all of which decide their applications.