This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET Jan 2020, Subject name: Anatomy
[{'content': 'A 54-year-old man comes to a hospital with abdominal pain, jaundice, loss of appetite, and weight loss. On examination of his radiograms and CT scans, a physician finds a slowly growing tumor in the uncinate process of the pancreas. Which of the following structures is most likely compressed by this tumor \nSelect and explain. \nA. Splenic aery, B. Poal vein, C. Superior mesenteric aery, D. Superior pancreaticoduodenal aery', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tumour of uncinated process of pancreas leads to pressure onSuperior mesenteric aerywhich passes below it.', 'role': 'assistant'}]