Deficiency of which of the following elements delay flowering in plants?

Options

A. Fe, Mn, Mo
B. N, S, Mo
C. Ca, Mg, K
D. N, K, S

Explanation

To answer the question regarding which elements' deficiency delays flowering in plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Plant Nutrients**:
- Plants require various nutrients for their growth and development, which are categorized into macronutrients and micronutrients. Macronutrients are needed in larger quantities, while micronutrients are required in smaller amounts.

2. **Identifying Relevant Nutrients**:
- The question specifically asks about elements whose deficiency leads to delayed flowering. We need to focus on both macronutrients and micronutrients that are known to influence flowering.

3. **Analyzing Specific Elements**:
- The elements that have been identified as causing delayed flowering when deficient are:
- **Nitrogen**: Essential for chlorophyll formation. Its deficiency leads to chlorosis (yellowing of leaves), which can affect overall plant health and flowering.
- **Sulfur**: Important for protein synthesis and chlorophyll formation. A deficiency can also lead to chlorosis and delay flowering.
- **Molybdenum**: Involved in nitrogen metabolism and its deficiency can cause intervenal chlorosis, which can also affect flowering.

4. **Conclusion**:
- The deficiency of nitrogen, sulfur, and molybdenum can all lead to delayed flowering in plants. Therefore, the correct answer to the question is that the deficiency of these elements delays flowering.

### Final Answer:
The deficiency of nitrogen, sulfur, and molybdenum delays flowering in plants.

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