The correct answer is C. Larynx.
Explanation
The respiratory system is the set of organs and tissues that are responsible for respiration in the body. This is composed of two parts that are the upper respiratory tract and the lower respiratory tract.
The Upper respiratory tract is composed of the nasal cavity, the pharynx, and the larynx. The lower respiratory tract is composed of the trachea, the lungs, and the bronchi.
According to the above, the correct answer is C. Larynx because this organ is not part of the lower respiratory tract but rather of the upper respiratory tract.
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