Which of the coordination compounds (i) to (v) are used for the following processes :
A: Electroplating
B: Removal of excess copper from human body
C: Estimation of hardness of water
(i) DMG (ii) \( Na_2EDTA \) (iii) Cis-platin (iv) D-penicillamine (v) \( K[Au(CN)_2] \)