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
Macrocytosis is seen in all of the following disorders, except- 
Select and explain. 
A. Hypothyroidism, B. Thalassemia major, C. Folic acid deficiency, D. B12 deficiency
B: Thalassemia major
Answer: B: Thalassemia major 
Explanation: Ans. is 'b' i.e., Thalassemia major