# When a galvanic cell is written in a cell diagram then

$\begin{array}{1 1}\text{left electrode serves as cathode}\\\text{left electrode serves as anode}\\\text{reduction reaction occurs at anode}\\\text{left electrode constitutes the positive terminal}\end{array}$

Answer : left electrode serves as anode
Left electrode is anode (negative terminal) and the reaction occurring here is the oxidation reaction.