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
Ham's test is used in Screening of 
Select and explain. 
A. Hereditary spherocytosis, B. G6PD deficiency, C. PNH, D. Any hemolytic disorder
C: PNH
Answer: C: PNH 
Explanation: Ham's test is the best screening test for paroxysmal nocturnal Hemoglobinuria.