Nutritive elements needed in large quantities to ensure normal plant development:

Question

Accepted Answer

Both a & b. Plants require macronutrients (N, P, K, S, Mg, Ca) and micronutrients (like Fe) in varying amounts. While N, P, K are primary macronutrients needed in large quantities, S, Mg, Ca are secondary macronutrients also needed in significant amounts compared to trace elements. Option C correctly groups the essential macro-elements listed.