This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Integrated QBank, Subject name: Unknown
A 58-year-old female, known case of multinodular goiter underwent sub-total thyroidectomy. After 8 days, patient again presented to the OPD with hoarseness of voice. The nerve which was damaged during the surgery supplies all the muscles marked except: - 
Select and explain. 
A. MUSCLE B, B. MUSCLE A, C. MUSCLE D, D. MUSCLE C
B: MUSCLE A
Answer: B: MUSCLE A 
Explanation: THIS IS A CLASSICAL CASE OF RECURRENT LARYNGEAL NERVE (RLN) PALSY POST THYROIDECTOMY. RLN SUPPLIES ALL THE MUSCLES OF LARYNX EXCEPT CRICOTHYROID WHICH IS SUPPLIED BY EXTERNAL LARYNGEAL NERVE.