When Jelmeter shows its reading 3/4 then how much sugar should be added?

Answer: Option B

A Jelmeter is a graduated glass tube with an opening at each end. It is an index to the amount of sugar to be used. It also determines the amount of pectin in fruit juice.
When the Jelmeter shows its reading $$\frac{3}{4}$$ then 750 gms of sugar should be added to the solution.