The correct option is B Fructose
Sucrose (table sugar) is the prototypical example of a sweet substance. Sucrose in solution has a sweetness perception rating of 100, and other substances are rated relative to this. Fructose, is somewhat sweeter, being rated at 1.7 times the sweetness of sucrose.
Relative sweetness of sugars:
Sucrose 100
Glucose 74
Lactose 16
Fructose 173