Which of the following mineral deficiencies will cause death of stem and root tips ?

Options

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

Answer

To solve the question regarding which mineral deficiency will cause the death of stem and root tips, we can follow these steps:

### Step 1: Understand the Role of Each Mineral
- **Molybdenum**: This mineral is primarily involved in the conversion of nitrate to nitrite in plants. It does not have a direct role in the growth or health of stem and root tips.

- **Calcium**: Calcium is essential for the formation of the middle lamella, which is crucial for cell wall stability and integrity. It also plays a significant role in the growth of stems and roots. A deficiency in calcium can lead to the death of stem and root tips.

- **Sulphur**: Sulphur is important for the synthesis of proteins, vitamins, and chlorophyll. While it is vital for metabolic processes, it does not directly cause the death of stem and root tips.

### Step 2: Analyze the Information
From the analysis:
- Molybdenum does not affect stem and root tips directly.
- Calcium deficiency is linked to the death of stem and root tips.
- Sulphur, while important, does not specifically lead to the death of these tips.

### Step 3: Conclusion
Based on the roles of these minerals, the mineral deficiency that will cause the death of stem and root tips is **Calcium**.

### Final Answer
**Calcium deficiency will cause the death of stem and root tips.**