In which part of the chloroplast, only PS I is functional?

Explanation

**Step-by-Step Solution:**

1. **Understanding Photosynthesis**: Photosynthesis is the process by which plants convert light energy into chemical energy, producing glucose and oxygen from carbon dioxide and water. It occurs in chloroplasts, which are specialized organelles in plant cells.

2. **Identifying the Two Main Reactions**: Photosynthesis consists of two main stages: the light reactions and the dark reactions (Calvin cycle). The light reactions occur in the thylakoid membranes of the chloroplasts, while the dark reactions take place in the stroma.

3. **Photosystems in Chloroplasts**: There are two types of photosystems involved in the light reactions: Photosystem I (PS I) and Photosystem II (PS II). These photosystems are essential for the absorption of light and the transfer of electrons.

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