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 of the following Pre-malignant conditions of vulva present with "Cake icing effect" 
Select and explain. 
A. Vulval intraepithelial neoplasia, B. Lichen sclerosis, C. Paget's disease of vulva, D. Leukoplakia
C: Paget's disease of vulva
Answer: C: Paget's disease of vulva 
Explanation: Extramammary paget's disease of vulva is characterised by well-demarcated erythematous lesion affecting the vulva with "cake - icing effect".