Which of the following is a component of coenzyme A, vitamin biotin, thiamine and mustard oil and whose deficiency results in decrease in nodule formation is

Options

A. Cu
B. Ca
C. S
D. Mn

Answer

To solve the question, we need to identify which mineral is a component of coenzyme A, vitamin biotin, thiamine, and mustard oil, and whose deficiency leads to a decrease in nodule formation.

### Step-by-Step Solution:

1. **Understanding the Components**:
- Coenzyme A, vitamin biotin, and thiamine are all important biomolecules in plants.
- Mustard oil is derived from mustard seeds and contains various nutrients.

2. **Identifying the Nutrient**:
- We need to find a common mineral that is part of coenzyme A, biotin, thiamine, and is also present in mustard oil.

3. **Researching the Role of Each Component**:
- Coenzyme A is involved in the synthesis and oxidation of fatty acids and the metabolism of carbohydrates.
- Vitamin biotin plays a crucial role in the metabolism of fats, carbohydrates, and proteins.
- Thiamine (Vitamin B1) is essential for energy metabolism and is involved in the synthesis of nucleic acids.

4. **Linking to Nodule Formation**:
- Nodule formation in plants is crucial for nitrogen fixation, which is facilitated by nitrogen-fixing bacteria.
- The mineral deficiency that affects nodule formation is often linked to the availability of certain nutrients.

5. **Identifying the Mineral**:
- The mineral that is a component of all the mentioned biomolecules and is essential for nodule formation is **sulfur**.
- Sulfur is found in the form of sulfate (SO4^2-) and is a structural component of the amino acids methionine and cysteine.

6. **Conclusion**:
- Therefore, the answer to the question is **sulfur**. Its deficiency leads to decreased nodule formation, which is vital for nitrogen fixation in plants.

### Final Answer:
**Sulfur**

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