Which of the following structures close the glottis during swallowing to prevent the entry of food wind pipe

Answer: BSolution: Epiglottis is a leaf shaped cartilage that closes the glottis (opening leading into tarachea) to cheak the entry of food into it during swallowing. If during eating epiglottis remains open, then food particles may center the trachea (wind pipe) lending to reflex action of couhing. This removes the food particles from traches so that breathing does not get obstructed.