The spaces guarding the opening of glottis in amphibians are
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Correct option is B)
The rima glottidis is the opening between the true vocal cords and the arytenoid cartilages. It is subdivided into two parts: that between the arytenoid cartilages is called the intercartilaginous part and that between the vocal folds the intramembranous part or glottis vocalis. It is closed by the lateral cricoarytenoid and arytenoid muscles.
Hence the correct option is B.
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