The vapour pressure of three liquids P , Q and R , of nearly equal molecular masses is shown as a function of temperature below. The correct statement is

Options

1. AThe normal boiling points follow the order P Q R .
2. BThe variation of pressure with respect to temperature for each liquid is given by d P d T = K T^2 , where K is
3. CThe strength of intermolecular interactions follows the order P Q R .
4. DThe normal boiling point of Q is close to 65^ C .