This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vocal Fold Palsy, Subject name: ENT
Kashima 's operation done for all conditions except: 
Select and explain. 
A. Vocal cord dysplasia, B. Ca larynx, C. Nasophargyneal Ca, D. Bilateral abductor palsy
C: Nasophargyneal Ca
Answer: C: Nasophargyneal Ca 
Explanation: Kashima's operation: A transverse Endoscopic transverse chordectomy/ Posterior paial chordectomy using CO2 laser- performed for treating the respiratory difficulty caused as a result of bilateral abductor vocal fold paralysis. It is done in case of: - B/L Recurrent Laryngeal nerve palsy. - Dysplastic vocal folds - Malignancies (not a mainstay treatment for malignancies)