Which of the following pair type of nutrient - nutrient is correct?

I. Macronutrient - Iron

II. Micronutrient - Calcium

Only II

The correct answer is Option (4)- Only II

Plants rely on nutrients to support their vital physiological processes, which can be classified into macro and micronutrients.

• Iron is considered a micronutrient because plants require it in relatively small quantities compared to macronutrients. Therefore, the pairing of iron with macronutrient is incorrect.
• Calcium, on the other hand, is categorized as a macronutrient due to its critical roles in both the structure and function of plants. Consequently, the pairing of calcium with micronutrient is inaccurate.