According to Boyle's law, the product of:.pressure and volume is a constant. Hence,
A
if volume of lungs is increased, then pressure decreases proportionately
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B
if volume of lungs is increased, then pressure also increases proportionately
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C
if volume of lungs is increased, then pressure decreases disproportionately
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D
if volume of lungs is increased, then pressure remains the same.
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Solution
The correct option is A if volume of lungs is increased, then pressure decreases proportionately
According to Boyle's law, the product of pressure and volume is a constant. Hence, if the volume of the lungs is increased, then pressure decreases proportionately.
So, the correct answer is 'if volume of lungs is increased, then pressure decreases proportionately'.