Answer:
<em>Cardiac muscles are found only in the heart. They regulate the contraction and relaxation of the heart, which helps in pumping blood through the circulatory system. The movements of the cardiac muscles are involuntary. They are important in sustaining life.</em>
The most appropriate answer is D ! as other three are not related to cilia any way !
so D
if you want more info on this, comment !
Keep flammable objects away from children ( although I am unsure because it should be forbid smoking in bed and keep flammable objects away from children)