Which one of the following statements is correct?

Options

A. Hard outer layer of pollen is called intine
B. Sporogenous tissue is haploid
C. Endothecium produces the microspores
D. Tapetum nourishes the developing pollen

Answer

To determine which statement is correct, we will analyze each of the four statements provided in the question.

### Step-by-Step Solution:

1. **Analyze Statement 1**: "Hard outer layer of pollen is entine."
- The outer layer of pollen grains is actually called **exine**, not entine. The inner layer is known as **entine**. Therefore, this statement is **incorrect**.

2. **Analyze Statement 2**: "Pollen grain is male gamete."
- Pollen grains are not the male gametes themselves; rather, they are the structures that contain the male gametes (sperm cells). Thus, this statement is also **incorrect**.

3. **Analyze Statement 3**: "Sporogenous tissue is diploid tissue."
- Sporogenous tissue, which is found in the microsporangium, is indeed **diploid**. This tissue undergoes meiosis to produce microspores, which are haploid. Therefore, this statement is **correct**.

4. **Analyze Statement 4**: "Androthecium produces microspores."
- The androecium (or androthecium) is the male reproductive part of a flower, which consists of stamens. However, it is not the androthecium that directly produces microspores; rather, microspores are produced from the sporogenous tissue within the microsporangium. Therefore, this statement is **incorrect**.

### Conclusion:
Based on the analysis, the correct statement is **Statement 3**: "Sporogenous tissue is diploid tissue."

---