Question

Which one of the following is not an essential element for plants?

• A. Iron
• B. Zinc
• C. Potassium
• D. Iodine

Hint:

Plants require macro- and micronutrients, but iodine is not one of the essential elements.

Answer 1

The Correct Option is D

Step 1: Essential elements are those nutrients that are required by plants for normal growth and completion of their life cycle.
Step 2: Iron, zinc, and potassium are essential plant nutrients involved in various physiological processes.
Step 3: Iodine is not required for plant growth and is therefore not considered an essential element for plants. Hence, the correct answer is iodine.