The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A lady presented with fatigue and tingling sensation in both hands and legs. On examination, she is found to have a fissured red tongue, lesions at angle of mouth and peripheral neuropathy with a decreased RBC glutathione reductase activity. What is the likely deficient vitamin?   (A) Riboflavin   (B) Vitamin B12   (C) Thiamine   (D) Vitamin B6
['(A) Riboflavin <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Riboflavin \n (B) Vitamin B12 \n (C) Thiamine \n (D) Vitamin B6 <> possible answers', '  A lady presented with fatigue and tingling sensation in both hands and legs. On examination, she is found to have a fissured red tongue, lesions at angle of mouth and peripheral neuropathy with a decreased RBC glutathione reductase activity. What is the likely deficient vitamin? <> context@']