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# Which of the following is an example of liquid solution?

$\begin{array}{1 1}(a)\;\text{mixture of oxygen and nitrogen gases}\\(b)\;\text{glucose dissolved in water}\\(c)\;\text{copper dissolved in gold}\\(d)\;\text{camphor in nitrogen gas}\end{array}$

'Glucose dissolved in water'
Here solute is glucose which is solid where as solvent is liquid state$(H_2O)$
Solute(solid/liquid)+solvent$\Rightarrow$ liquid solutions
Hence (b) is the correct answer.