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: Ophthalmology
Which of the following nerve constitute the afferent component of corneal reflex? 
Select and explain. 
A. Vagus nerve, B. Facial nerve, C. Trigeminal nerve, D. Glossopharyngeal nerve
C: Trigeminal nerve
Answer: C: Trigeminal nerve 
Explanation: The afferent component of corneal reflex is mediated by trigeminal nerve and efferent component is mediated by facial nerve which innervates the orbicularis oculi muscle. In this reflex, touching the cornea from the side while the subject looks forward evokes blinking. Ref: Comprehensive Ophthalmology By A K Khurana, 4th Edition, Pages 292-3; Color Atlas of Neurology By Reinhard Rohkamm, Page 26.