The following is a scheme showing the fate of carbohydrates during digestion in the human alimentary canal. Identify the enzymes acting at stages indicated as A, B, C, and D. Choose the correct option from those given.

Options

A. A= amylase, B=maltase, C= lactase, D= invertase
B. A= amylase, B= maltase, C= invertase, D= lactase
C. A= amylase, B= invertase, C= maltase, D= lactase
D. A= amylase, B= lactase, C= maltase, D= invertase

Answer

D

Explanation

Starch is digested into maltose by salivary amylase. Maltose is further digested into glucose units by maltase. Lactose is digested into glucose and galactose by lactose. Sucrose is digested into glucose and fructose by invertase.