After fertilization one of the following changes is noticed in the ovary of Capsicum and potato.

Options

A. Chromoplasts conversion to chloroplasts
B. Chloroplasts conversion to chromoplasts
C. Leucoplasts conversion to chromoplasts
D. Leucoplasts conversion to chloroplasts

Answer

To answer the question regarding the changes observed in the ovary of Capsicum and potato after fertilization, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Components of the Ovary**:
- The ovary of Capsicum and potato primarily consists of leukoplasts. These are a type of plastid that are involved in the storage of starch and other substances.

**Hint**: Remember that leukoplasts are non-pigmented plastids found in plant cells.

2. **Identify the Process of Fertilization**:
- After fertilization, the ovary begins to undergo changes as it develops into a fruit. This process involves the transformation of plastids.

**Hint**: Think about how fertilization triggers developmental changes in plant structures.

3. **Determine the Conversion of Plastids**:
- During the ripening process that follows fertilization, the leukoplasts in the ovary are converted into chloroplasts. Chloroplasts are the plastids responsible for photosynthesis and contain chlorophyll.

**Hint**: Recall that chloroplasts are green and involved in photosynthesis, while leukoplasts are typically colorless.

4. **Final Changes After Fertilization**:
- After the initial conversion of leukoplasts to chloroplasts, as the fruit continues to ripen, the chloroplasts can further convert into chromoplasts, which are responsible for the coloration of ripe fruits.

**Hint**: Chromoplasts are often associated with the bright colors of fruits and flowers.

5. **Select the Correct Option**:
- Based on the above understanding, the correct answer to the question is that after fertilization, leukoplasts are converted to chloroplasts.

**Final Answer**: The correct option is **Option 4: leukoplast conversion to chloroplast**.

### Summary:
After fertilization in Capsicum and potato, leukoplasts in the ovary are converted to chloroplasts, which is a significant change that occurs during the development of the fruit.