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
A 50 year old male chronic smoker complains of hoarseness for the past 4 months. Microlaryngoscopic biopsy shows it to be keratosis of the larynx. All are suggested treatment modalities for this condition, except - 
Select and explain. 
A. Laser vaporizer, B. Stop smoking, C. Stripping of vocal cord, D. Partial laryngectomy
D: Partial laryngectomy
Answer: D: Partial laryngectomy 
Explanation: None