This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Stomach & Duodenum, Subject name: Surgery
[{'content': 'A patient who has undergone partial gastrectomy presents with neurological symptoms. Most probable diagnosis: \nSelect and explain. \nA. Folic acid deficiency, B. Thiamine deficiency, C. Vitamin B12 deficiency, D. Iron deficiency', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Vitamin B12 deficiencyRef: Sabsiton 20th Edition, Page 1212* Following partial gastrectomy there is decreased production of Intrinsic factor which leads to vitamin B12 deficiency.', 'role': 'assistant'}]