A graph between vapour pressure and temperature of few liquids is given below . Study the graph and answer the following :
Which of the following statements is true ?
A. Boiling point of a liquid is the temperature at which its vapour pressure become equal to atmospheric pressure .
B. Boiling point of water can be increased by increasing the pressure above the atmospheric pressure .
C. Liquid C has higher boiling point than B due to higher intermolecular forces .
D. All of the these .