Which of the following structures prevents entrance of food and water into the respiratory passages?

Question

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The epiglottis functions as a flap- like structure that covers the larynx during swallowing, preventing food and water from entering the respiratory passages. The larynx (A) is important for producing sound and also acts as a passageway for air to enter the lungs. The glottis (B) is the opening between the vocal cords within the larynx, and plays a role in regulating airflow during breathing. The thyroid cartilage (D) is a protective structure that surrounds and supports the larynx, but does not directly prevent the entrance of food or water into the respiratory passages.

Which of the Following Structures Prevents Entrance of Food and Water