In photosynthetic bacteria, the pigments occur in
Chloroplasts
Chromatoplasts
Chromatophores
Leucoplasts.

Options

A. Chloroplasts
B. Chromatoplasts
C. Chromatophores
D. Leucoplasts.

Answer

To solve the question "In photosynthetic bacteria, the pigments occur in," we need to analyze each of the given options to determine where pigments are found in these organisms.

### Step-by-Step Solution:

1. **Understand the Question**: We are looking for the location of pigments in photosynthetic bacteria, specifically in organisms like cyanobacteria.

2. **Evaluate the First Option - Chloroplasts**:
- Chloroplasts are organelles found in higher plants and are responsible for photosynthesis.
- They contain chlorophyll and are green in color.
- **Conclusion**: Chloroplasts are not present in photosynthetic bacteria. This option is incorrect.

3. **Evaluate the Second Option - Chromatoplasts**:
- Chromatoplasts are a type of plastid that contains pigments and are typically found in certain plant tissues.
- They are brightly colored but are not found in photosynthetic bacteria.
- **Conclusion**: Chromatoplasts are absent in photosynthetic bacteria. This option is also incorrect.

4. **Evaluate the Third Option - Chromatophores**:
- Chromatophores are specialized cells that contain pigments and are involved in photosynthesis in certain bacteria.
- They can absorb light in the range of 460 to 550 nanometers and can appear yellow, red, or orange.
- **Conclusion**: Chromatophores are indeed present in photosynthetic bacteria. This option is correct.

5. **Evaluate the Fourth Option - Leucoplasts**:
- Leucoplasts are colorless plastids that are involved in the storage of starches, oils, and proteins.
- They are not involved in photosynthesis and are found in higher plants.
- **Conclusion**: Leucoplasts are not found in photosynthetic bacteria. This option is incorrect.

6. **Final Answer**: Based on the evaluations, the correct answer is **C. Chromatophores**.