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
At 28 weeks gestation, amniocentesis reveals a AOD 450 of 0.20 which is at the top of third zone of the liley curve. The most appropriate management of such a case is: 
Select and explain. 
A. Immediate delivery, B. Intrauterine transfusion, C. Repeat Amniocentesis after 1 week, D. Plasmapheresis
B: Intrauterine transfusion
Answer: B: Intrauterine transfusion 
Explanation: Management of Rh negative females depends on whether the female is immunized/ nonimmunized. The question which says- what should be done in case of the paitent with 28 weeks pregnancy if ∆ OD lies at the top of Zone 3.