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
Best Investigation to assess tubal patency: 
Select and explain. 
A. Rubin's test, B. HSG, C. Laparotomy, D. Laparoscopic chromtubation
D: Laparoscopic chromtubation
Answer: D: Laparoscopic chromtubation 
Explanation: None