The correct option is C Cristae
Dynamic equilibrium is the maintenance of body position in response to sudden movements. The receptors for dynamic equilibrium are present in cristae of ampullae located at the ends of semi-circular canals.
Sensory impulses are carried to brain through auditory nerves. The cerebellum of brain analyse the data and sends signals for proper balance.
The vestibular system is the sensory apparatus of the inner ear that helps the body maintain its postural equilibrium.
So, the correct answer is 'Cristae'.