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 three days old infant develops jaundice upto thigh. " Mother's blood group O '–ve' and baby is A `+ve' probable causes – 
Select and explain. 
A. Physiological jaundice, B. Rh incompatibility, C. Septicemia, D. Extrahepatic biliary atresia
A: Physiological jaundice
Answer: A: Physiological jaundice 
Explanation: None