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
All are true regarding paroxysmal nocturnal haemoglobinuria, except- 
Select and explain. 
A. Haemosiderinuria, B. Pancytopenia, C. Increased alkaline phosphatase, D. Cellular marrow
C: Increased alkaline phosphatase
Answer: C: Increased alkaline phosphatase 
Explanation: None