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
All are preleukemic conditions, except: 
Select and explain. 
A. Paroxysmal Nocturnal Hemoglobinuria, B. Paroxysmal Cold Hemoglobinuria, C. Aplastic anemia, D. Myelodysplastic syndrome
B: Paroxysmal Cold Hemoglobinuria
Answer: B: Paroxysmal Cold Hemoglobinuria 
Explanation: . Paroxysmal Cold Hemoglobinuria