Correct Option: AExplanation:The cartilaginous structure called epiglottis is a flap of elastic gristle tissue lined with mucosa, hooked up to the entrance of the vocal organ. It barriers the entry of food into the larynx and routes it to the esophagus. One may instantly start coughing while swallowing food because of the improper movement of the epiglottis. Hence, improper movement of epiglottis leads to cough while swallowing food.