Choose the odd one out in each of the following groups of four items each:
(a) Trachea, Bronchus, Alveolus, Diaphragm.
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Solution
The correct answer is Diaphragm.
Trachea, Bronchus, and alveolus are a part of the respiratory tract.
The diaphragm is not a part of the respiratory tract and helps in the change in thoracic pressure.
So, the odd one out is 'Diaphragm'.