Correct option is C
Explanation-
Baroreceptors in the carotid sinus detect changes in blood pressure. These signals are transmitted via afferent fibers of the glossopharyngeal nerve (cranial nerve IX). The cell bodies of these sensory neurons are located in the petrosal ganglion.
So, the petrosal ganglion is responsible for carrying the activity of baroreceptors from the carotid sinus.
So, the correct answer is option c - Petrosal ganglion.
Incorrect options-
Option a - Nodose ganglion
Associated nerve: Vagus nerve (cranial nerve X)
Function: Carries sensory information from the aortic arch baroreceptors, viscera, and other thoracic/abdominal organs. It carries aortic baroreceptor input, not carotid sinus baroreceptor input.
Option b - Geniculate ganglion
Associated nerve: Facial nerve (cranial nerve VII)
Function: Conveys taste sensations from the anterior two-thirds of the tongue and sensory information from the external ear. It has no role in baroreception from either the carotid sinus or aortic arch.
Option d - Spiral ganglion
Associated nerve: Cochlear nerve (part of cranial nerve VIII – vestibulocochlear nerve)
Function: Transmits auditory (hearing) signals from the cochlea to the brain. It has no connection to cardiovascular or baroreceptor functions.
