Please help me with this question

Dear student,
Please find below the answer:

The correct option is (2).
The given diagram shows bolus moving down the food pipe or oesophagus. Oesophagus is present behind the trachea. Since both the trachea and the oesophagus share a common passage called the pharynx, food can move in the trachea as well. To prevent this, the trachea has a muscular flap called the epiglottis. This epiglottis covers the trachea during the swallowing process. Hence, the food moves in the oesophagus i.e. food pipe only.

Hope this clears your doubt.
Regards.
 

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