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
Investigation of choice to detect Hydatiform mole is: 
Select and explain. 
A. X-ray abdomen, B. USG, C. Serum HCG level, D. Gravindex
B: USG
Answer: B: USG 
Explanation: USG