This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Pain in left hypochondrium vomiting, diarrhea, malena, weight loss diagnosis 
Select and explain. 
A. Cholangitis, B. Enterocolitis, C. Zollinger Ellison syndrome, D. Amebiasis
C: Zollinger Ellison syndrome
Answer: C: Zollinger Ellison syndrome 
Explanation: Answer- C. Zollinger Ellison syndromePeptic ulceration is the most common manifestation of Zollinger Ellison syndrome leading to left hypochondriac pain, vomlting and weight loss and ulcers refractory to medical therapy.A bleeding ulcer gives rise to malena.