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
Features considered under Reid colposcopic index are all except 
Select and explain. 
A. Margin, B. Color, C. Vessels, D. Floor
D: Floor
Answer: D: Floor 
Explanation: Colposcopic signs:
→ Margin
→ Color
→ Vessels
→ Iodine staining.