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: Radiology
The method to diagnosis misplaced intra uterine device is 
Select and explain. 
A. Ultrasound, B. X-Ray abdomen (Erect view), C. Uterine sound & Hysteroscopy, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: D i.e. All of above Investigation of choice in displaced IUD is Ultrasound, but we can also diagnose this by X-Ray abdomen (metal in IUD produces radioopaque shadow) & Hysteroscopy (Endoscopic visualization of uterus).