When two half-cells of electrode potential of E1 and E2 are combined to form a cell of electrode E3, — AITS & Test Series Chemistry Question

Question

When two half-cells of electrode potential of E1 and E2 are combined to form a cell of electrode E3, then (where n1, n2 and n3 are number of electrons exchanged in first, second and combined half cells): (A) 3 2 1 E E E (B) 1 1 2 2 3 3 E n E n E n (C) 1 1 2 2 3 2 3 E n E n E n (D) 3 1 2 E E E