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
Bleeding disorder with ↑ a PTT is/are -a) Hemophilia Ab) Hemophilia Bc) Henoch-schonlein purpurad) Bernard-soulier syndromee) Von-Willebrand disease 
Select and explain. 
A. abe, B. bcd, C. cde, D. acd
A: abe
Answer: A: abe 
Explanation: None