This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid Gland, Subject name: Surgery
Total thyroidectomy done for a female . Following the surgery she developed stridor and dyspnea. The possible cause is: 
Select and explain. 
A. Bilateral superior laryngeal nerve injury, B. Unilateral superior laryngeal nerve injury, C. Bilateral recurrent laryngeal nerve injury, D. Unilateral recurrent laryngeal nerve injury
C: Bilateral recurrent laryngeal nerve injury
Answer: C: Bilateral recurrent laryngeal nerve injury 
Explanation: Ans. (c) Bilateral Recurrent Laryngeal nerve InjuryRef: Bailey and Love 26th edition, page 761* Unilateral recurrent laryngeal nerve injury results in hoarseness* Bilateral recurrent laryngeal nerve injury results in Stridor