1.

What mixture of gases are used in anesthesia?

A. O<sub>2</sub> and N<sub>2</sub>O
B. O<sub>2</sub> and CO<sub>2</sub>
C. CO<sub>2</sub> and N<sub>2</sub>O
D. O<sub>2</sub> , CO<sub>2</sub> and N<sub>2</sub>O
Answer» B. O<sub>2</sub> and CO<sub>2</sub>


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