Brass is an alloy of copper and zinc having the relative percentage
(A) 60-70% Cu and 30-40% Zn
(B) 50-60% Cu and 40-50% Zn
(C) 40-50 % Cu and 60-50% Zn
(D) 30-40 % Cu and 60-70% Zn
(A) 60-70% Cu and 30-40% Zn
(B) 50-60% Cu and 40-50% Zn
(C) 40-50 % Cu and 60-50% Zn
(D) 30-40 % Cu and 60-70% Zn