Select the correct answer from A, B, C and D.
(i) Aqua regia is a mixture of :
A : Dilute hydrochloric and cone, nitric acid
B : Cone, hydrochloric acid and dilute nitric acid
C : One part of cone, hydrochloric acid 3 parts of cone, nitric acid.
D : 3 parts of Cone, hydrochloric acid and 1 part of cone, nitric acid