In lungs there is definiteexchange of ions between RBC and plasma. Removal of `CO_(2)` from blood involves
A. Influx of `Cl^(-)` ions into RBC
B. Influx of `HCO_(3)^(-)` ions into RBC
C. Efflux of `Cl^(-)` ions into RBC
D. Efflux of `HCO_(3)^(-)` ions into RBC