<span>The correct option is A. There are three basic type of solutions, these are: unsaturated, saturated and super saturated solution. An unsaturated solution is a solution that has the capacity to hold more solute at a particular temprature, it is a solutin that is not yet saturated with the solute [particles dissolve in it].</span>
Explanation:
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When angle between them is zero
D.<span>Wave 3 resulted from constructive interference, and Wave 4 resulted from destructive interference.
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