Chlorosis is produced in the leaves due to the deficiency of Fe , Mg , Mn , S or N of these essential elements, those that are exclusive constituents of chlorophyll molecule are

Step-by-step solution

Magnesium is present in the central position of tetrapyrrole ring of the chlorophyll molecule. Porphyrin is a cyclic tetrapyrrole ring made up of four nitrogen containing pyrrole rings arranged in a cyclic fashion in the chlorophyll molecule.