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 test for measuring Graffian follicle Maturation is : 
Select and explain. 
A. Fern test, B. Endometrial biopsy, C. Transvaginal ultrasonography, D. Abdominal sonography
C: Transvaginal ultrasonography
Answer: C: Transvaginal ultrasonography 
Explanation: Transvaginal ultrasonography