The composition of aqua-regia is? Mark as favorite Copy Link Conc.HCl (3) : Conc.HNO3 (1) Dil.HCl (3) : Dil.HNO3 (1) Dil. HCl (3) : Conc. HNO3 (1) Conc.HCl (3) : Dil. HNO3 (1) Check Answer