दिया गया है
`Co^(3+) +e^- to Co^(2+), E^@=+1.81 V`
`Pb^(4+) +2e^- to Pb^2,E^@=+1.67V`
`Ce^(4+)+e^- to Ce^(3+) , E^@=+1.61V`
`Bi^(3+)+3e^- to Bi, E^@ =+0.20 V`
स्पीशीज की उपचायक समर्थ इस क्रम में बढ़ेगी

Options

A. `Ce^(4+) lt Pb^(4+) lt Bi^3 lt Co^(3+)`
B. `Bi^3 lt Ce^(4+) lt Pb^(4+) lt Co^(3+)`
C. `Co^(3+) lt Pb^(4+) lt Ce^(4+) lt Bi^(3+)`
D. `Co^(3+) lt Ce^(4+) lt Bi^3 lt Pb^(4+)`

Answer

B