The correct option is A Cuneiform cartilage
There are 9 pieces of cartilages surrounding the larynx. 3 are single and other 3 are paired.
Epiglottis is a leaf shaped elastic cartilage which projects into the pharynx. It closes the glottis (opening of the windpipe) during swallowing.
Thyroid cartilage is the largest cartilage of the larynx. It supports the larynx on the front and sides. It is made up of hyaline cartilage.
Cricoid cartilage is a signet ring in shape. It lies below the thyroid cartilage and is made up of hyaline cartilage. It forms a part of the larynx. It provides the point of attachment for muscles, ligaments, cartilage that help in the opening and closing of vocal cords during sound production.
Arytenoid cartilages are 2 in number. These are small and pyramidal in shape. They are situated at the back of the larynx and are made mostly of hyaline cartilage. A small portion of them consist of elastic cartilage as well.
Corniculate cartilages are 2 small conical nodules made up of elastic cartilages. They are located at the upper ends of arytenoid cartilages and articulate with them.
Cuneiform cartilages are 2 small rod shaped cartilages that connect the epiglottis to arytenoid cartilages. They are made up of elastic cartilage.