This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neonatal Jaundice, Subject name: Pediatrics
A newborn presents with jaundice within 1st 24 hours. His mother's blood group is O +ve. Next line of management is? 
Select and explain. 
A. Wait for serum bilirubin level before staing treatment, B. Phototherapy, C. Exchange transfusion, D. Stop breast feeding
B: Phototherapy
Answer: B: Phototherapy 
Explanation: Jaundice detected within 1st 24 hours- always pathological. Phototherapy- initiated Breast feeding- continued