Solved UPSC CDS/OTA Question
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Q · Digestive Systemmedium · 45s
Pernicious anemia results from deficiency of:
TopicDigestive System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Pernicious anemia is caused by autoimmune destruction of gastric parietal cells producing intrinsic factor, leading to impaired vitamin B₁₂ absorption in the ileum. Vitamin B₁₂ is essential for red blood cell formation and neurological function.
Final Answer: Option C - Vitamin B₁₂