Answer:
The correct option is A
Step-by-step explanation:
The forces of attraction among the molecules or atoms of a substance are called inter molecular forces.
When two atoms gain temporary dipole and become polar for an instant the inter molecular forces of attraction between then are known as London dispersion forces.
London Dispersion Forces:
It is a type of inter molecular force that occurs when the electrons in two adjacent atoms are displaced in such a way that the atoms get some temporary dipoles, they attract each other through London dispersion forces. These inter molecular forces usually occur between non polar substances.