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
Acquired intrinsic defect in Hymolytic anemia is seen in - 
Select and explain. 
A. Sicicle cell anemia, B. Hereditary spherocytosis, C. Thalasemmia, D. Paroxysmal nocturnal hemoglobinuria
D: Paroxysmal nocturnal hemoglobinuria
Answer: D: Paroxysmal nocturnal hemoglobinuria 
Explanation: None