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
In abdominal pregnancy, the pathognomonlc sign is: 
Select and explain. 
A. Jacquemier, B. Chadwick, C. Puskacek, D. Weinberg
D: Weinberg
Answer: D: Weinberg 
Explanation: Weinberg