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 10 year old boy developed hoarseness of voice following an attack of diphtheria. On examination, his Rt vocal cord was paralysed.The treatment of choice for paralysed vocal cord will be: 
Select and explain. 
A. Gel foam injection of right vocal cord, B. Fat injection of right vocal cord, C. Thyroplasty type-I, D. Wait for spontaneous recovery of vocal cord
D: Wait for spontaneous recovery of vocal cord
Answer: D: Wait for spontaneous recovery of vocal cord 
Explanation: Unilateral paralysis of cord due to neuritis (as in diphtheria) does not require any treatment as it recovers spontaneously. The characteristic features of diphtherial neuropathy is that it recovers completely.