How Much 1% Boric Acid Solution and 5% Boric Acid

Multiple Choice

How much 1% boric acid solution and 5% boric acid solution are needed to make 60 mL of a 3% boric acid solution?

A) 10 mL of 1% boric acid solution; 50 mL of 5% boric acid solution
B) 20 mL of 1% boric acid solution; 40 mL of 5% boric acid solution
C) 30 mL of 1% boric acid solution; 30 mL of 5% boric acid solution
D) 40 mL of 1% boric acid solution; 20 mL of 5% boric acid solution