Photosynthesis occurs in
(a) Leaves
(b) Leaf cells
(c) Plants
(d) Chloroplasts

Options

A. Leaves
B. Leaf cells
C. Plants
D. Chloroplasts.

Answer

To determine where photosynthesis occurs, let's analyze the options provided:

1. **Leaves**:
- Leaves are the primary sites for photosynthesis in plants. They contain chloroplasts, which are essential for the photosynthetic process. However, while leaves are important, they are not the most specific answer.

2. **Leaf Cells**:
- Leaf cells, specifically mesophyll cells, contain chloroplasts where photosynthesis takes place. This option is more specific than just saying "leaves," but it still doesn't pinpoint the exact location of the photosynthesis process.

3. **Plants**:
- This option is too broad. While photosynthesis occurs in plants, it does not specify where within the plant the process takes place.

4. **Chloroplasts**:
- Chloroplasts are the organelles within plant cells where photosynthesis actually occurs. They contain the necessary pigments and structures to carry out the light-dependent and light-independent reactions of photosynthesis.

Based on this analysis, the most accurate answer to the question "Photosynthesis occurs in" is:

**(d) Chloroplasts**

### Step-by-Step Solution:
1. **Identify the process**: Understand that photosynthesis is the process by which plants convert light energy into chemical energy.
2. **Evaluate the options**: Consider each option to determine where photosynthesis occurs.
3. **Narrow down the options**: Realize that while leaves and leaf cells are involved, they are not the specific sites of the photosynthetic reactions.
4. **Select the most specific answer**: Conclude that chloroplasts are the actual sites of photosynthesis, making option (d) the correct choice.