The initial step in the digestion of milk in humans is carried out by

A healthy person eats the following diet-5 gm raw sugar, 4 gm albumin, 10 gm pure buffalo ghee adultrated with 2 gm vegetable ghee (hydrogenated vegetable oil) and 5 gm lignin. How many calories he is likely to get?

Which enzymes are likely to act on the backed potatoes eaten by a man, starting from the mouth and as it moves down the alimentary canal?

Select the correct match of the digested products in humans given in column $${\rm I}$$ with their absorption site and mechanism in column $${\rm I}$$$${\rm I}$$.