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
Which is true about Haemophilia A? 
Select and explain. 
A. Increased BT, B. Increased PT, C. Increased PTT, D. Increased platelet count
C: Increased PTT
Answer: C: Increased PTT 
Explanation: PTT is increased in haemophilia A.