Bilirubin and biliverdin are formed in-

Correct Answer: B

Rationale: Bilirubin and biliverdin are bile pigments formed in the liver from hemoglobin breakdown.

Correct Answer: D

Rationale: Amino acids are absorbed mainly in the jejunum and ileum of the small intestine.

Correct Answer: C

Rationale: Succus entericus is secreted by Crypts of Lieberkuhn and Brunner's glands.

Correct Answer: D

Rationale: Crypts of Lieberkuhn secrete enzymes like maltase that split carbohydrates.

Correct Answer: C

Rationale: Vitamins are absorbed without digestion, unlike macronutrients.