A) Ca
B) Fe
C) Mg
D) P
Correct Answer: B
Solution :
\[\text{F}{{\text{e}}^{\text{2+}}}\]is a component of haemoglobin i. e., iron and proteins are raw material for the synthesis of haemoglobin and thus also for RBCs. Deficiency of \[\text{F}{{\text{e}}^{\text{2+}}}\]as well as protein, vitamin \[{{\text{B}}_{12}}\]and folic acid can cause anaemia. Calcium is useful for the formation of bones, teeth and muscular and nerve activities. It also helps in blood clotting. Its deficiency causes rickets and muscle spasms. Magnesium helps in release of energy. It also acts as catalyst. The magnesium takes part in muscle relaxation and keeps nerves relaxed. Phosphorus is a part of energy carriers (ATP, ADP, AMP) nucleic acids and coenzymes. It functions in muscle and nerve activities and maintaining blood pH.
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