Which of the following is must for chlorophyll synthesis

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Solution

The correct option is B Mg
Magnesium is an important ion for chlorophyll synthesis. It catalyzes the first step of chlorophyll synthesis, that is the insertion of Mg $^{2 +}$ ion into protoporphyrin IX. Deficiency of magnesium results in yellowing of the leaves due to lack of chlorophyll.
Thus, the correct answer is option B.

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Which of the following elements is needed for chlorophyll biosynthesis?

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