Which of the following galvanic cells no liquid junction potential?

Options

A. `Zn underset((C_(1)))(-)Hg|Zn-SO_(4)"solution"|Zn underset((C_(2)))(-)Hg`
B. `H_(2) underset((C_(1)))(|)H_(2)SO_(4)"solution"||CuSO_(4)underset((C_(2)))("solution")|Cu`
C. `underset((C_(1)))(Ag|AgCl|HCl"solution"|)underset((C_(2)))(|HCl "solution"|AgCl|Ag`
D. none of these

Answer

A

Explanation

Since cathode and anode are present in the same solution hence liquid -liquid junction potential is elimenated in option (A).