Medium· Mineral Elements (Essential Mineral Elements)· +4 / −1
Match **List I** with **List II** :
| List I | List II |
|---|---|
| A. Iron | I. Synthesis of auxin |
| B. Zinc | II. Component of nitrate reductase |
| C. Boron | III. Activator of catalase |
| D. Molybdenum | IV. Cell elongation and differentiation |
Choose the **correct** answer from the options given below :