The correct option is C Duodenum
The digestion of starch begins with the action of salivary alpha-amylase (ptyalin), and pancreatic amylase in the small intestine. Digestion and absorption of carbohydrates is fast and takes place usually in the upper small intestine (duodenum). The absorption of most digested food occurs in the small intestine through the brush border of the epithelium covering the villi.