During the swallowing reflex .
A. the tongue closes off the pharynx
B. the epiglottis closes off the glottis
C. breathing rate increases
D. the esophageal sphincter closes off the esophagus

The correct statement will be - B

The epiglottis closes off the glottis.

Explanation:

During the swallowing reflex - the epiglottis closes off the glottis.

Our respiratory and digestive system shares a common path. At the time of swallowing something, the epiglottis closes off the glottis which helps the food to go downwards further easily. Otherwise, there is a chance that the food can enter the windpipe and can choke a person. Sometimes this could be fatal.