World Geography English MCQ Sikkim PSC (Pre) 2016 RAS/RTS (Re. Exam)(Pre) 2013 Q.Which group of minerals represents non-ferrous metals? ANickel, Zinc, Copper, Aluminium BNickel, Aluminium, Iron-ore, Zinc CCopper, Pig iron, Nickel, Steel DNickel, Carbon Steel, Aluminium, Zinc Show answer Correct answer: Nickel, Zinc, Copper, Aluminium