This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Medicine
Which of the following is the most common presentation of hemophilia A? 
Select and explain. 
A. hematuria, B. melena, C. hemarthrosis, D. pressure neuropathy
C: hemarthrosis
Answer: C: hemarthrosis 
Explanation: The most common presentation is with pain in a weight-bearing joint such as the hip, knee, or ankle. Hematuria is also common. Bleeding can occur at almost any site without prior trauma.