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
A 40 year old tobacco chewer was given a routine oral examination; on examination non-scrapable white patch was noticed in his left buccal mucosa.

Diagnosed disease 
Select and explain. 
A. Normal variation of mouth, B. Developmental disorder, C. Premalignant Lesion, D. Premalignant condition
C: Premalignant Lesion
Answer: C: Premalignant Lesion 
Explanation: None