Question

Which one of the following metal is present in a vitamin and deficiency of that vitamin causes a person anaemia ?

• A. Iron
• B. Copper
• C. Magnesium
• D. Cobalt

Answer 1

The correct option is D Cobalt

Cobalt is present in cyanocobalamin or cobalamins (vitamin-$B_{12}$). is a dark red coloured cobalt based vitamin which contains a porphyrin rings in its structure. Cobalt and vitamin B12 are present within our body and not taken from external sources, thus it is a nonessential element. Deficiency of vitamin-$B_{12}$ causes pernicious anaemia. Whereas Copper-present in hemocyanin, iron in haemoglobin, zinc present in carbonic anhydrase. Magnesium is a component of chlorophyll.

Thus, the answer is option D.