What is the cell reaction occurring in Daneill cell (galvanic cell) ?
A. `Cu(s)+ZnSO_(4)(aq.) rarr CuSO_(4)(aq.) + Zn(s)`
B. `Zn(s)+CuSO_(4)(aq.) rarr Cu(s)+ZnSO_(4)(aq.)`
C. `Ni(s)+ZnSO_(4)(aq.) rarr NiSO_(4)(aq.)+Zn(s)`
D. `2Na(s)+CdSO_(4)(aq.) rarr Na_(2)SO_(4)(aq.)+Cd(s)`
