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': 'The parents of an 8-yr old boy complained of frequent severe bleeding on minor trauma\n\nWhen they consulted a dentist for a decayed tooth, he advised for checking of prothrombin time (PT) and plasma thromboplastin time (PTT), which would be as follows \nSelect and explain. \nA. PT is normal, PTT is normal, B. PT is prolonged, PTT is prolonged, C. PT is normal, PTT is prolonged, D. PT is prolonged, PTT is normal', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]