Patient after surgery at the lateral part of skull developed aspiration in postoperative period

Patient after surgery at the lateral part of skull developed aspiration in postoperative period without voice change. Which of the following nerve injury is responsible?
A. High vagal injury
B. Recurrent laryngeal nerve
C. Superior laryngeal nerve
D. Glossopharyngeal nerve
Sir, answer given is D. But aspiration is due to loss of internal laryngeal nerve injury. Shouldn’t answer be C?

Superior laryngeal nerve also gives external laryngeal nerve; which innervates cricothyroid and in ELN #, there will be failure to elevate pitch.

So best answer D.

The superior laryngeal nerve (SLN) gives the ILN which provides sensory supply to the larynx and ELN which provides motor supply to the cricothyroid. If the SLN were affected, there would be hoarseness of voice as the cricothyroid is a tensor of the vocal cords. In the question, the patient has developed aspiration without voice change. This is because of the loss of gag reflex. The sensory supply of the pharynx and afferent for deglutition up to the area just rostral to the epiglottis would be CN IX or glossopharyngeal nerve. Hence, D would be the answer. Thank you.