Which nutrient helps in the formation of chlorophyll?

Correct option is D

Magnesium (Mg) is the nutrient that helps in the formation of chlorophyll in plants. Chlorophyll is the green pigment responsible for photosynthesis, the process by which plants convert light energy into chemical energy to fuel their growth.
Magnesium is a central component of the chlorophyll molecule, and its presence is essential for the stability of chlorophyll. Without an adequate supply of magnesium, plants would exhibit chlorosis, a condition characterized by yellowing of the leaves due to a lack of chlorophyll.