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Question: Answered & Verified by Expert
Assertion : Duodenum is the main organ of small intestine.
Reason : In duodenum, digestion and absorption mainly occurs.
BiologyDigestion and AbsorptionAIIMSAIIMS 2013
Options:
  • A If both assertion and reason are true and reason is the correct explanation of assertion.
  • B If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C If assertion is true but reason is false
  • D If both assertion and reason are false
Solution:
2235 Upvotes Verified Answer
The correct answer is: If both assertion and reason are false
Principal organ for digestion and absorption for nutrients is small intestine. Small intestine is distinguishable into three regions, a 'U' shaped duodenum, a long coiled middle portion jejunum and a highly coiled ileum. Mainly iron, calcium and amino acids are absorbed in duodenum; fatty acids, glycerol, monosaccharides and vitamins are absorbed in jejunum, and absorption of vitamin $B_{12}$, bile salts and water occur in ileum.

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