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
Investigations for carcinoma cervix in the early stage are all except : 
Select and explain. 
A. Surface biopsy, B. Ultrasound, C. Colposcopic guided biopsy, D. Schiller's test
B: Ultrasound
Answer: B: Ultrasound 
Explanation: Ultrasound