Match the partial pressure of carbon dioxide in different parts involved in diffusion in comparison to the atmosphere.
Column-$I$ Column-$II$ ($mm\, Hg$ pressure) $P$. Atmospheric air $I$. $40$ $Q$. Tissues $II$. $45$ $R$. Oxygenated blood $III$. $0.3$
| Column-$I$ | Column-$II$ ($mm\, Hg$ pressure) |
| $P$. Atmospheric air | $I$. $40$ |
| $Q$. Tissues | $II$. $45$ |
| $R$. Oxygenated blood | $III$. $0.3$ |
- A$(P-III), (Q-II), (R-I)$
- B$(P-III), (Q-I), (R-II)$
- C$(P-I), (Q-II), (R-II)$
- D$(P-II), (Q-I), (R-III)$
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