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
A 32 weeks premature infants, 900gm weight on the third days. The serum bilirubin is 13 mg%. The treatment of choice is – 
Select and explain. 
A. Exchange transfusion, B. Phototherapy, C. Wait and watch therapy, D. Pharmacologic therapy
A: Exchange transfusion
Answer: A: Exchange transfusion 
Explanation: None