Which of the following sugars have the same number of carbon as present in glucose?
a. Fructose
b. Erythrose
c. Ribulose
d. Ribose
Among the options, it is fructose which falls in the category of monosaccharides. In fact, glucose and fructose both fall in this category, and they have 6 atoms of carbon. Hence, Option (a) is the correct answer.