Question

A young infant may be feeding entirely on mother's milk which is white in colour but the stools which the infant passes out is quite yellowish. The yellow colour of stool is due to

• A. bile pigments passed through bile juice
• B. undigested milk protein casein
• C. pancreatic juice poured into duodenum
• D. intestinal juice.

Answer 1

The correct option is A bile pigments passed through bile juice

The yellow colour of the stools is due to the presence of bile pigments. Bile pigments are the excretory products. Bile is a bitter-tasting greenish-yellow alkaline fluid produced by the liver and stored in the gall bladder and secreted into the duodenum. It assists the digestion and absorption of fats by the action of bile salts, which chemically reduce fatty substances and decrease the surface tension of fat droplets so that they are broken down and emulsified. So, the correct answer is (a).