. Which of the following metals are refined byelectrolytic refining?(i) Au (ii) Cu(iii) Zn (iv) K(1) (i) and (ii) (2) (ii) and (iii)(3) (i), (ii), (iii) (4) (ii), (iii) and (iv)

. Which of the following metals are refined byelectrolytic refining?(i

1.	. Which of the following metals are refined byelectrolytic refining?(i) Au (ii) Cu(iii) Zn (iv) K(1) (i) and (ii) (2) (ii) and (iii)(3) (i), (ii), (iii) (4) (ii), (iii) and (iv)
Answer» AMMONIUM and COPPER.