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: ENT
Which of the following is premalignant - 
Select and explain. 
A. Chronic glossitis, B. Submucous fibrosis, C. Hypertrophic glossitis, D. Aphthous stomatitis
B: Submucous fibrosis
Answer: B: Submucous fibrosis 
Explanation: Lesions and conditions of the oral mucosa associated with an increased risk of malignancy.