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: Pathology
Which of the following has highest malignant transformation rate: 
Select and explain. 
A. Erythroplakia., B. Proliferative Verrucous leukoplakia, C. Speckled leukoplakia., D. Homogenous leukoplakia.
B: Proliferative Verrucous leukoplakia
Answer: B: Proliferative Verrucous leukoplakia 
Explanation: None