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Which of the following is NOT part of the lower respiratory tract?

  1. Lungs

  2. Trachea

  3. Bronchi

  4. Larynx

The correct answer is: Larynx

The other options (A, B, and C) are all part of the lower respiratory tract, which includes the trachea, bronchi, and lungs. The larynx is actually part of the upper respiratory tract, as it is involved in the production of sound and houses the vocal cords.