Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): PH_3 has lower boiling point…

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : $\displaystyle \mathrm{PH}_3$ has lower boiling point than $\displaystyle \mathrm{NH}_3$. Reason (R) : In liquid state $\displaystyle \mathrm{NH}_3$ molecules are associated through vander Waal's forces, but $\displaystyle \mathrm{PH}_3$ molecules are associated through hydrogen bonding. In the light of the above statements, choose the most appropriate answer from the options given below: