There are two types of forces found in molecules.
1. Intramolecular Forces
2. Intermolecular Forces
Intramolecular forces are those which holds the atoms to form a molecule.
Examples.
a. Covalent Bond
b. Ionic Bond
c. Metallic Bond
These forces are very stronger and large amount of energy is required to break them
While, Intermolecular Forces are found between the molecules.
Examples,
a. Hydrogen Bonding
b. Dipole-Dipole Interactions
c. London Dispersion Forces
These forces are weak as compared to intramolecular forces, hence, less energy is required to break them
Result:
Option A is the correct answer.