Q.) Rings of cartilage, in the throat prevents:
(a) Collapsing of air passage.
(b) Entering of food in wind pipe.
(c) Bacterial infection in the tract.
(d) Entering of microbes.
Ans: (a) collapsing of air passage
Explanation: Rings of cartilage are present in the throat as it helps the throat from collapsing when there is a low amount of air present.