At $100^oC$ the vapour pressure of a solution of $6.5 \;g$ of a solute in $100\; g$ water is $732\; mm$. If $K_b = 0.52$, the boiling point of this solution will be:

Question

( A ) $103^oC$
( B ) $101^oC$
( C ) $102^oC$
( D ) $100^oC$