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
Hair on end appearance is seen in: 
Select and explain. 
A. Thalassemia, B. Scurvy, C. Rickets, D. Sickle cell disease
A: Thalassemia
Answer: A: Thalassemia 
Explanation: Ans. Thalassemia