The rise in boiling point of a solution containing $1.8 \ g$ of glucose in $100 \ g$ of solvent is $0.1^{\circ} C$. The molal elevation constant of the liquid is
- A$1 \ K \ kg / mol$
- B$2 \ K \ kg / mol$
- C$10 \ K \ kg / mol$
- D$0.1 \ K \ kg / mol$
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