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: Pathology
[{'content': 'Prostaglandin was discovered from ? \nSelect and explain. \nA. Tear, B. Saliva, C. Seminal fluid, D. Blood', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is \'c\' i.e., Seminal fluid "The name prostaglandin comes from the prostate gland. When prostaglandin was first isolated from seminal fluid, it was believed to have been added from the prostate."', 'role': 'assistant'}]