Verified Answer :

Hagrid

A mixture is potassium and chlorine. A mixture is a combination of pure substances that have no definite
composition. It may be either a homogenous or heterogeneous. 

Answer : The correct option is potassium and chlorine.

Explanation :

Mixture : It is a substance which is made by the combination of two or more things in such a way there is no chemical reaction occurs.

For example : Sand and water, oil and water, milk and chocolate, etc.

  • Potassium is a metal.
  • Chlorine is a gas.
  • Potassium chloride is a compound.
  • Potassium and chlorine is a mixture.