Explanation:

Carbohydrates are the most important dietary nutrients which provide energy to the body and also act as a source of carbon for the synthesis of other substances. All carbohydrates have varying degrees of sweetness on a relative scale with sucrose. The sweetness of sugars is rated with respect to sucrose being taken as 100. Those sweeter than sucrose is rated more than 100 and those less sweet than sucrose are rated below 100. 
fructose is the sweetest of all sugar.