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: Pediatrics
[{'content': 'Hemophilic A have following diagnostic features, except \nSelect and explain. \nA. ↓VIII factor, B. ↑PTT, C. ↑PT, D. Normal BT', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]