Ambient air contains what percentage of oxygen?

A) 100 percent B) 50 percent C) 21 percent D) 10 percent

C

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Which of the following is a biological agent capable of causing disease?

a. Aseptic agent b. Contamination c. Pathogen d. Fomite

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Wrong doses can easily be avoided by using

A) unit-dose systems B) expired drugs C) internet pharmacy D) generic drugs

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