This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chronic Inflammation, Subject name: Pathology
[{'content': 'Procalcitonin is used as marker of: \nSelect and explain. \nA. Cardiac dysfunction in acute coronary syndrome, B. Menstrual periodicity, C. Pituitary function, D. Sepsis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Procalcitonin is an acute phase reactant which is now useful for being a marker of sepsis.', 'role': 'assistant'}]