Vapour pressure — temperature curves of pure solvent and solution containing a non-volatile solute are depicted in the figure aside. Select the correct statements(s) of the following

Vapour pressure of solution containing non volatile solute is always less than that of solvent.This is due to decrease in chemical potential when solute is added to solvent to prepare solution. Gap ab represents elevation in boiling point because points ‘’a'' and ‘’b'' represents boiling point of solvent and solution respectively. when solute is added to solvent boiling point increases.