Which of the following nutrient elements is not a micronutrient?

Answer: Option C

Among the following given options, Sulphur is not a micronutrient, whereas copper, zinc and Iron are micronutrients, required in very small amounts by plants for their functioning and growth.
Sulphur is a macronutrient, required in large proportions by plants for adequate growth and development. It is used in the formation of amino acids, proteins, and oils. It is also necessary for chlorophyll formation, promotes nodulation in legumes and helps activate specific enzymes and vitamins.