36. Please answer this

Dear student,
Please find below the answer:

The correct option is (B).
A. During inhalation, ribs move upward and forward.
C. Hemoglobin has a greater affinity for carbon monoxide. 
D. Alveoli help in increasing surface area for the exchange of gases.
                                         
Hope this information clears your doubt.
Regards.                 
 

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Option (B)
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Option 'B' but not sure
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