Statement-I: During inspiration, contraction of external inter-costal muscles increases the volume of thoracic chamber in the antero-posterior axis.
Statement-II: Carbonic anhydrase facilitates the production of 
from 
and 
.
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Verified by ExpertsThe correct answer is:
D
The contraction of external inter-costal muscles lifts up the ribs and the sternum causing an increase in the volume of the thoracic chamber in the dorso-ventral axis
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