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A 60-year-old patient presented with anorexia, weakness, paresthesia and mental changes. His tongue was red, tendon reflexes were diminished, haemoglobin was 6 g% with large red cells and neutrophils had hypersegmented nuclei. Endoscopy revealed atrophic gastritis. Deficiency of which factor is likely to be responsible for his condition: A. Folic acid B. Vitamin B12 C. Pyridoxine D. Riboflavin

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A 60-year-old patient presented with anorexia, weakness, paresthesia and mental changes. His tongue
was red, tendon reflexes were diminished, haemoglobin was 6 g% with large red cells and neutrophils
had hypersegmented nuclei. Endoscopy revealed
atrophic gastritis. Deficiency of which factor is likely
to be responsible for his condition:
A. Folic acid
B. Vitamin B12
C. Pyridoxine
D. Riboflavin
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B. Vitamin B12
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