Elements most readily moblised are:

Options

A. Ca,B,Fe
B. K,P,Ca
C. N,P,K
D. Cl,Fe,B

Answer

To answer the question about which elements are most readily mobilized in plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Mobilization**:
- Mobilization refers to the ability of certain mineral nutrients to move within the plant from older tissues to newer ones, especially during periods of nutrient demand.

2. **Identifying Key Elements**:
- Some elements are known to be readily mobilized in plants. These include:
- **Nitrogen**: Primarily moves in the form of amino acids and related compounds.
- **Phosphorus**: Can be remobilized from older tissues to support new growth.
- **Sulfur**: Similar to phosphorus, it can also be moved within the plant.
- **Potassium**: This element is also known for its mobility within plant tissues.

3. **Exclusion of Non-Mobilized Elements**:
- Some elements, such as calcium, are structural components of plant cells and are not readily remobilized. Therefore, they are excluded from the list of mobilized elements.

4. **Conclusion**:
- The elements that are most readily mobilized in plants are **Nitrogen, Phosphorus, Sulfur, and Potassium**. Among these, the most commonly recognized ones in terms of mobility are Nitrogen, Phosphorus, and Potassium.

### Final Answer:
- The elements most readily mobilized are **Nitrogen, Phosphorus, and Potassium**.