Which of the following is a macronutrient for plants?
A. Phosphorus
B. Iron
C. Copper
D. Zinc
Answer: Option A
Solution (By JKSSB Mock Tests)
Phosphorus is a primary macronutrient (along with nitrogen and potassium) required in relatively large amounts for nucleic acids, ATP, and phospholipids. Iron, zinc, and copper are micronutrients needed in trace amounts. Macronutrients include C, H, O, N, P, K, Ca, Mg, S. Micronutrients function as enzyme cofactors.
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