Answer:
a. oropharynx.
Explanation:
oropharynx -
It is basically the mouth area of the body , and one of the seven openings that is found in the pharynx .
It is one of the part in throat present behind the mouth and the oral cavity . The area behind the oral cavity , including soft palate , tongue , the tonsils and the back wall of the throat .
Hence , the correct answer is - oropharynx .