which of the following could be considered a solution?\na oxygen gas\nb air\nc pure water\nd all of the above

which of the following could be considered a solution?\na oxygen gas\nb air\nc pure water\nd all of the above
Answer
Answer:
B. air
Brief Explanations:
A solution is a homogeneous mixture. Oxygen gas is an element, not a mixture. Pure water is a compound, not a mixture. Air is a homogeneous mixture of gases like nitrogen, oxygen, carbon - dioxide etc., so it can be considered a solution.