Chemistry
Aqua regia is a 1 : 3 mixture, by volume, of

Conc. nitric acid and conc. sulphuric acid
Conc. nitric acid and conc. hydrochloric acid
Conc. hydrochloric acid and conc. nitric acid
Conc. sulphuric acid and conc. nitric acid

ANSWER DOWNLOAD EXAMIANS APP