In Rh lso Immunisation, exchange transfusion is indicated if –
(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) 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