The structure in the neck known as the "adam's apple" is the
a. epiglottis.
b. cricoid cartilage.
c. glottis.
d. thyroid cartilage.

d. thyroid cartilage.

Explanation:

The Adam's apple , also called the laryngeal prominence .

It is present in the neck of the human's body  and it is a  lump or which is made up of the thyroid cartilage ,  surrounding the larynx area .

Adam's apple is prominently visible in the neck of most of the males .

The shape of Adam's apple is like a bump present under the layer of the skin . In males , it is clearly visible and is palpable .

the ileocecal valve (also called bauhin valve), which limits the rate of food passage into the cecum and may prevent material from returning to the small intestine.

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