Given below are two statements : One is labelled as Assertion A and other is labelled as Reason R.
Assertion A : The dihedral angles in H$$_2$$O$$_2$$ in gaseous phase is 90.2$$^\circ$$ and in solid phase is 111.5$$^\circ$$.
Reason R : The change in dihedral angle in solid and gaseous phase is due to the difference in the intermolecular forces.
Choose the most appropriate answer from the options given below for A and R.