Concept:Iron is a micronutrient that is indispensable for the synthesis of chlorophyll in green plants.
Explanation:Chlorophyll is the green pigment present in chloroplasts, and plants need several mineral elements to build it.
Iron (
Fe) is essential for the formation of chlorophyll in plants.
Although iron is not a structural part of the chlorophyll molecule, it acts as a cofactor for the enzymes that carry out chlorophyll synthesis.
When iron is deficient, chlorophyll production stops, causing leaves to become pale yellow — a condition known as chlorosis.
Among the given options, only iron is required for this process.
Calcium (
Ca), phosphorus (
P), and sulphur (
S) are not directly involved in chlorophyll formation.
Answer:A. Iron