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
All predisposes to isoimmunisation in a Rh-ve female except : 
Select and explain. 
A. Advanced maternal age, B. Antepaum hemorrhage, C. Cesarean section, D. Post dated pregnancy
A: Advanced maternal age
Answer: A: Advanced maternal age 
Explanation: Ans. is a i.e. Advanced maternal age Conditions predisposing to isoimmunization in Rh -ve female Aboiondeg, ectopic pregnancy, molar pregnancy * Chorionic villous samplingdeg, Cordocentesis * Trauma Amniocentesisdeg * Antepaum hemorrhage Attempted versiondeg * Vaginal delivery Manual removal of placenta * Cesarean section