Given below are two statements: One is labeled as Assertion A and the other is labelled as Reason R.
Assertion A: The dihedral angles in \( \mathrm{H_2O_2} \) 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.
