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: Medicine
[{'content': 'Hemophilic A has 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'}]