Which of the following is a mobile mineral element in the plants?

Options

A. Ca
B. Mo
C. Fe
D. Cu

Explanation

To determine which of the following is a mobile mineral element in plants, we can follow these steps:

### Step 1: Understand the Classification of Mineral Elements
Mineral elements in plants are classified based on their mobility. There are two categories:
- **Mobile Elements**: These can move from older leaves to younger leaves.
- **Immobile Elements**: These cannot move from older leaves to younger leaves.

### Step 2: Identify the Elements in the Question
The elements given in the question are:
- Calcium
- Molybdenum
- Iron
- Copper

### Step 3: Analyze Each Element's Mobility
1. **Calcium**: This is considered an immobile element because it is incorporated into the cell wall and cannot be transported to newer leaves.
2. **Molybdenum**: This is classified as a mobile element, meaning it can move from older leaves to younger leaves.
3. **Iron**: This is also an immobile element, as it does not move from older to younger leaves.
4. **Copper**: Similar to iron, copper is classified as an immobile element.

### Step 4: Conclusion
Based on the analysis, the only mobile mineral element among the options provided is **Molybdenum**.

### Final Answer
**Molybdenum** is the mobile mineral element in plants.

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