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: Pharmacology
[{'content': 'All of the following are true about prostaglandin E2 except : \nSelect and explain. \nA. It is the principal prostaglandin synthesized in the stomach, B. Its biosynthesis is inhibited by aspirin, C. It stimulates gastric acid secretion, D. It causes dilatation of submucosa blood vessels', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]