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
Ovarian pregnancy is due to: 
Select and explain. 
A. Previous sexually transmitted infections, B. Feilisation of ovum in ovary, C. Bicornuate uterus, D. Pelvic tuberculosis
B: Feilisation of ovum in ovary
Answer: B: Feilisation of ovum in ovary 
Explanation: Feilisation of ovum in ovary