Which of the following gives Molisch's test 

Molisch 's Test : This is a general test for carbohydrates. One or two drops of alcoholic solution of $\mathrm{\alpha }$- naphthol is added to  glucose solution. $1 \mathrm{ml}$ of conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$ solution is added carefully along the sides of the test tube. The formation of a violet ring at the junction of the liquids confirms the presence of a carbohydrate or sugar