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
In Rh lso Immunisation, exchange transfusion is indicated if – 
Select and explain. 
A. Cord blood hemoglobin is less than 10 g %, B. Cord bilirubin is more than 5 mg, C. History of previous sibling affected, D. All of these
D: All of these
Answer: D: All of these 
Explanation: Indications of Exchange transfusion

Cord hemoglobin      _.10g/dL          

o Bilirubin protein ratio >3.5       
o Prematurity

Cord bilirubin          >5mg/d            

o Reticulocyte count > 15%

Previous kernicterus or severe erythroblastosis in a sibling