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Q.

The metal ions in Hemoglobin, chlorophyll and vitamin B₁₂are A, B, C respectively. Then

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a

$\begin{array}{l} A = {Fe}^{+ 2} \\ B = {Mg}^{+ 2} \\ C = {Co}^{+ 3} \end{array}$

b

$\begin{array}{l} A = {Fe}^{+ 3} \\ B = {Mg}^{+ 2} \\ C = {Co}^{+ 2} \end{array}$

c

$\begin{array}{l} A = {Fe}^{+ 2} \\ B = {Zn}^{+ 2} \\ C = {Co}^{+ 3} \end{array}$

d

$\begin{array}{l} A = {Fe}^{+ 2} \\ B = {Mg}^{+ 2} \\ C = {Zn}^{+ 2} \end{array}$

answer is A.

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Detailed Solution

$Hemoglobin - {Fe}^{+ 2}$

$Chlorophyll - {Mg}^{+ 2}$

$Vitamin B_{12} - {Co}^{+ 3}$

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