Identify the largest cantonment of Pakistan?

A. Kharian Cantt
B. Quetta Cantt
C. Okara Cantt
D. Karachi Cantt

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Major contribution in inhalation by:

A. Diaphragm

B. Intercoastal muscles

C. Sternum

D. None of these

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Presence of cartilaginous rings in respiratory tract sct as:

A. Support

B. Keep passage open

C. Prevent collapsing

D. All of the above

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