8.2 Carboxylic acids and their derivative — Chemistry STD 12 Science — Question

Assertion $(A)$ : $\mathrm{PH}_3$ has lower boiling point than $\mathrm{NH}_3$.

Reason $(R)$ : In liquid state $\mathrm{NH}_3$ molecules are associated through vander waal's forces, but $\mathrm{PH}_3$ molecules are associated through hydrogen bonding. In the light of the above statements, choose the most appropriate answer from the options given below: