Glucose, gatactose and fructose all have the same molecular size and composition and their absorption through the mucosal cells takes place

Glucose and galactose when being absorbed are absorbed at a rapid rate and fructose because these are absorbed by active absorption. Here the ATP is used for the absorption of glucose and galactose. Fructose is absorbed passively by simple diffusion, therefore, it is a slower process.

So, the correct option is 'glucose is absorbed most rapidly'