The correct options are
A A solution is a homogeneous mixture of two or more substances
B We can have solid solutions
C A solution can be concentrated and dilute
D Lemonade is an example of a solution
A solution is a specific type of mixture where one substance is dissolved into another or mixed together uniformly throughout. Solutions are homogeneous systems.
Everything in a solution is evenly spread out and thoroughly mixed. On the basis of the concentration of solute, a solution can be classified as a dilute and concentrated solution. Alloy is an solid solution and lemonade is true solution.
Therefore all the statements are correct.