This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Larynx, Subject name: ENT
A patient with hoarseness of voice was found to be having pachydermia laryngis. All of the following are true except: 
Select and explain. 
A. It is a hyperkeratotic lesion present within the anterior two-third of the vocal cords, B. It is not premalignant lesion, C. Diagnosis is made by biopsy, D. On microscopy it shows acanthosis and hyperkeratosis
A: It is a hyperkeratotic lesion present within the anterior two-third of the vocal cords
Answer: A: It is a hyperkeratotic lesion present within the anterior two-third of the vocal cords 
Explanation: Pachydermia laryngis is a hyperkeratotic lesion involving posterior part of larynx. It is not premalignant. Biopsy is essential to exclude tuberculosis and cancer.