Correct option is D
· Iron (Fe) is required for chlorophyll biosynthesis, making (A) → (III) correct.
· Zinc (Zn) plays a role in Indole-3-Acetic Acid (IAA) biosynthesis, making (B) → (IV) correct.
· Boron (B) is crucial for pollen germination, making (C) → (I) correct.
· Manganese (Mn) is essential for photolysis of water in photosynthesis, making (D) → (II) correct.