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: Radiology
'H' shaped veebra is seen in: 
Select and explain. 
A. Phenylketonuria, B. Sickle cell anemia, C. Hemangioma, D. Osteoporosis
B: Sickle cell anemia
Answer: B: Sickle cell anemia 
Explanation: Ans. Sickle cell anemia