Match List - I with List - II and select the correct answer from the codes given below:  List - I  List - II
 A. Vitamin B₁₂  1. Magnesium
 B. Haemoglobin  2. Cobalt
 C. Chlorophyll  3. Copper
 D. Brass  4. Iron

1. A.A - 2, B - 4, C - 1, D - 3
2. B.A - 2, B - 1, C - 3, D - 4
3. C.A - 4, B - 1, C - 2, D - 3
4. D.A - 3, B - 4, C - 2, D - 1