The larynx contains:
a) the thyroid cartilage
b) C-shaped rings of cartilage
c) a cricoid cartilage also called the Adam's apple
d) an upper pair of avascular mucosal folds called true vocal folds
e) lateral cartilage ridges called false vocal folds

c) a cricoid cartilage also called the Adam's apple

Explanation:

Larynx comprise three large cartilages, cricoid is one of them. This cartilage is present in the middle of the neck which covers the trachea. It is responsible for the opening and closing of windpipe and it also helps the human in speaking. It is softer than bone due to its composition. It is also called Adam's apple due to its structure.

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.