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
Hemophilic A have following diagnostic features, except 
Select and explain. 
A. ↓VIII factor, B. ↑PTT, C. ↑PT, D. Normal BT
C: ↑PT
Answer: C: ↑PT 
Explanation: None