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
Earliest complaint of OSMF patient is: 
Select and explain. 
A. Blanching, B. Burning sensation, C. Restricted mouth opening, D. Shrunken uvula
B: Burning sensation
Answer: B: Burning sensation 
Explanation: Prodromal Symptoms (Early OSF) 
This includes a burning sensation in the mouth when consuming spicy food, appearance of vesicles especially on the palate, ulcerations or recurrent generalized inflammation of the oral mucosa, excessive salivation, defective gustatory sensation and dryness of the mouth. There are periods of exacerbation manifested by the appearance of small vesicles in the cheek and palate. The intervals between such exacerbations vary from 3 months to 1 year. Focal vascular dilatations manifest clinically as petechiae in the early stages of the disease.
Reference: Shafer’s Textbook of ORAL PATHOLOGY Eighth Edition page no 148