Electrochemistry

Some standard electrode potentials at 298 K are given below :

Pb²⁺ /Pb = \(-\)0.13 V

Ni²⁺ /Ni = \(-\) 0.24 V

Cd²⁺ /Cd = \(-\) 0.40 V

Fe²⁺ /Fe = \(-\) 0.44 V

To a solution containing 0.001 M of X²⁺ and 0.1 M of Y²⁺, the metal rods X and Y are inserted (at 298 K) and connected by a conducting wire. This resulted in dissolution of X. The correct combination(s) of X and Y, respectively, is(are)

(Given : Gas constant, R = 8.314 J K^\(-\) mol^\(-\)1, Faraday constant, F = 96500 C mol^\(-\)1)