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
Osiander's sign means : 
Select and explain. 
A. Pulsation in the lateral vaginal fornix, B. Bluish colour change in the vagina, C. Softening of the cervix, D. On bimanual palpation the finger can be approximated as if nothing is in between
A: Pulsation in the lateral vaginal fornix
Answer: A: Pulsation in the lateral vaginal fornix 
Explanation: Pulsation in the lateral vaginal fornix