Assertion : Conductivity of all electrolytes decreases on dilution.

In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. 

(i) Both assertion and reason are true and the reason is the correct explanation of assertion. 

(ii) Both assertion and reason are true and the reason is not the correct explanation of assertion. 

(iii) Assertion is true but the reason is false. 

(iv) Both assertion and reason are false. 

(v) Assertion is false but reason is true.

Assertion : Conductivity of all electrolytes decreases on dilution.

Reason : On dilution number of ions per unit volume decreases.