This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
A patient who has undergone paial gastrectomy presents with neurological symptoms. Most probable diagnosis 
Select and explain. 
A. Folic acid deficiency, B. Thiamine deficiency, C. Vitamin B 12 deficiency, D. Iron deficiency
C: Vitamin B 12 deficiency
Answer: C: Vitamin B 12 deficiency 
Explanation: In case of patients undergoing paial gastrectomy, postoperatively supplemented with vitamin B12 to avoid associated deficiency manifestations due to loss of gastric mucosa. Ref: SRB&;s manual of surgery,3 rd ed, pg no 757