The mixture of $$\text{Al(OH)}_3$$ and $$\text{Fe(OH)}_3$$ can be separated by :

(i) leaching, (ii) froth floatation, (iii) gravity separation and (iv) magnetic separation

A

(i) and (ii) only

B

(ii) and (iii) only

C

(i) and (iv) only

D

(iii) and (iv) only