Columella is a structure found in

Options

A. Ascus of Penicillium
B. Sporangium of Rhizopus
C. Pycnidia of Puccinia
D. None of the above.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the structure known as "Columella" and where it is found.

2. **Defining Columella**: Columella is a specialized structure that plays a role in the nutritional exchange between the active protoplasm and the developing spore. It acts as a bridge for this exchange.

3. **Identifying the Options**: The options provided are:
- A) Ascus of Penicillium
- B) Sporangium of Rhizopus
- C) Pinkidia of Puccinia
- D) None of the above

4. **Analyzing Each Option**:
- **Option A**: Ascus of Penicillium - Columella is not found here.
- **Option B**: Sporangium of Rhizopus - This is where the Columella is located, specifically on the sporangiophore of Rhizopus.
- **Option C**: Pinkidia of Puccinia - Columella is not found here.
- **Option D**: None of the above - This is incorrect since we have identified the correct option.

5. **Conclusion**: Based on the analysis, the correct answer is **Option B: Sporangium of Rhizopus**.

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