alleryChlorophyll, haemoglobin and vitamin B₁₂ are coordination compounds of:
ACu, Fe and Mg respectively
BMg, Fe and Co respectively
CFe, Mg and Co respectively
DCa, Mg and Fe respectively
Answer & Solution
Correct answer: B. Mg, Fe and Co respectively
**Chlorophyll = Mg porphyrin** (light harvesting in plants).
**Haemoglobin = Fe protoporphyrin** (O₂ transport).
**Vitamin B₁₂ (cyanocobalamin) = Co corrin complex** (anti-pernicious anaemia factor).
Three of the most important biological coordination compounds.
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