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
A patient who has undergone partial gastrectomy presents with neurological symptoms. Most probable diagnosis: 
Select and explain. 
A. Folic acid deficiency, B. Thiamine deficiency, C. Vitamin B12 deficiency, D. Iron deficiency
C: Vitamin B12 deficiency
Answer: C: Vitamin B12 deficiency 
Explanation: 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.