Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · Digestive Systemmedium · 45s
The main function of the large intestine is:
TopicDigestive System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
The large intestine (colon) absorbs water, electrolytes (Na⁺, Cl⁻), and vitamins produced by gut microbiota, forming and storing feces. It hosts a large microbial population that ferments residual carbohydrates and synthesizes vitamins K and B₁₂.
Final Answer: Option C - Water and electrolyte absorption