A) Fe and Ca
B) Fe and Mg
C) Cu and Ca
D) Ca and K
Correct Answer: B
Solution :
Mg is a important constituent of chlorophyll molecule where it occupies a central position and essential for photosynthesis and Fe plays an important role in ETS, photosynthesis and respiration because iron is the part of cytochromes. It is also essential for chlorophyll synthesis.
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