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.
A = Amylase, B = Maltase, C = Lactase, D = Invertase
A = Amylase, B = Maltase, C = Invertase, D = Lactase
A = Amylase, B = Invertase, C = Maltase, D = Lactase
A = Amylase, B = Lactase, C = Maltase, D = Invertase