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in Biology by (25.1k points)
Which substances when present in high level can
activate the chemosensitive area present adjacent
to rhythm centre?
A. `CO_(2) and O_(2)`
B. `HCO_(3)^(-)` ions and `O_(2)`
C. `CO_(2) and H^(+)` ions
D. `H^(+) and HCO_(3)^(-)` ions

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