The negative $Zn$ pole of Daniell cell, sending a constant current through a circuit, decreases in mass by $0.13\;g$ in $30$ minutes. If the electrochemical equivalent of $Zn$ and $Cu$ are $32.5$ and $31.5$ respectively, the increase in the mass of the positive $Cu$ pole in this time is :

Question

( A ) 0.141 g
( B ) 0.126 g
( C ) 0.242 g
( D ) 0.180 g