Step 1: Understanding the Concept:
This question tests knowledge of the functions of plant nutrients.
Step 2: Detailed Explanation:
Nitrogen (A):
Essential component of amino acids (IV), which are the building blocks of proteins.
Thus, A matches with IV.
Phosphorus (B):
A key component of ATP (adenosine triphosphate) (III), the energy currency of cells.
Thus, B matches with III.
Calcium (C):
Important for cell wall structure and stability (I).
Thus, C matches with I.
Magnesium (D):
Central atom in chlorophyll molecules (II), essential for photosynthesis.
Thus, D matches with II.
Step 3: Final Answer:
Thus, the correct matching is A-IV, B-III, C-I, D-II.
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