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
The first change in precancerous lesion on colposcopy is 
Select and explain. 
A. Mosaics, B. Puntation, C. Acetowhite lesions, D. Cork-screw vessels
B: Puntation
Answer: B: Puntation 
Explanation: The first change in precancerous lesion is punctuation