Which nutrient is considered as a macro nutrient?

Correct option is C

The correct answer is (C) K (Potassium)

Explanation:
• Plant nutrients are divided into Macronutrients and Micronutrients based on the quantity required by the plant.
• Macronutrients are required in large amounts. They include Nitrogen (N), Phosphorus (P), Potassium (K), Calcium (Ca), Magnesium (Mg), and Sulfur (S).
• Potassium (K) is one of the three primary macronutrients (NPK) essential for various physiological processes, including water regulation (stomata opening/closing) and enzyme activation.
• Micronutrients (Trace elements) are required in very small quantities. These include Iron (Fe), Zinc (Zn), Manganese (Mn), Copper (Cu), Boron (B), Molybdenum (Mo), and Chlorine (Cl).

Information Booster:
• Non-mineral macronutrients like Carbon (C), Hydrogen (H), and Oxygen (O) are obtained from air and water.

Additional Knowledge:
• Zn (Option A): Zinc is a micronutrient involved in auxin synthesis and enzyme systems.
• Fe (Option B): Iron is a micronutrient essential for chlorophyll synthesis and electron transfer in photosynthesis.
• Cl (Option D): Chlorine is a micronutrient involved in the photolysis of water during photosynthesis.