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: Gynaecology & Obstetrics
Hemolytic disease of newborn is least common with which blood group female - 
Select and explain. 
A. A, B. B, C. 0, D. AB
C: 0
Answer: C: 0 
Explanation: Ans. is 'c' i.e., OABO incompatibility has a protective effect to the development of Rh sensitization and thus the development of hemolytic disease of newborn