MCQOPTIONS
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| 1. |
Forced deep breathing for a few minutes by a person at rest may be followed by a temporary cessation of breathing, because of: |
| A. | Too much \[{{O}_{2}}\] in blood. |
| B. | Too much \[C{{O}_{2}}\] in blood, |
| C. | Little \[C{{O}_{2}}\] in blood. |
| D. | Both too much \[{{O}_{2}}\] and very little \[C{{O}_{2}}\] in blood. |
| Answer» E. | |