The route that the sensation of taste follows is a: Primary axons pass along cranial nerves VII and IX. b: Primary neurons synapse in the nucleus solitarius. c: Secondary neurons synapse in the thalamus. d: Tertiary neurons travel to the primary gustatory cortex.

d: Tertiary neurons travel to the primary gustatory cortex.

Explanation:

The gustatory system is a sensory system that is responsible for the taste. when the food comes in contact with the taste cells present on the tongue so these taste buds carry information to the brain about flavor of the food. The chorda tympani nerve that is present at the front of the tongue, the glossopharyngeal nerve present at the back of the tongue and the vagus nerve present at the throat area and palate are the three nerve cells which carry signals to the brain stem.