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
Which investigation is not done in FIGO staging of CA cervix: 
Select and explain. 
A. Cystoscopy, B. Chest X-ray, C. Pelvic ultrasound, D. IVP
C: Pelvic ultrasound
Answer: C: Pelvic ultrasound 
Explanation: None