Answer:
The correct answer is option A, Dispersion Force
Step-by-step explanation:
The molecules and atoms of n-pentane are non-polar and thus there is no chance of any dipole –dipole interaction between the molecules of n –pentane. There exists repulsion between the electrons moving in near to each other in respective orbits. The molecule of n-pentane processes instantaneous dipole moment due to instantaneous distribution of electrons and since the molecules are very close to each other instantaneous dipole moment in one molecule induces instantaneous dipole moment in the other molecule and thus there exists an attractive force between the non polar molecules of n –pentane known as Dispersion Forces