Aqua regia is...

Aqua regia is

A

Mixture dil. HCl and dil. `HNO_3` in the volume ratio 1:1

B

Mixture of conc. `HNO_3` and conc. HCl in the volume ration 1:3

C

Mixture of conc. `HNO_3` and conc. HCl in the volume ration 3:1

D

Ni

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