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: Pediatrics
Constitutional pancytopenia can be seen in following except – 
Select and explain. 
A. Fanconi's anemia, B. Diamond–Blackfan syndrome, C. Dyskeratosis congenita, D. Schwachman Diamond syndrome
B: Diamond–Blackfan syndrome
Answer: B: Diamond–Blackfan syndrome 
Explanation: None