Which of the following is/are formed during Z-scheme of photophosphorylation?

Options

A. ATP
B. `NADPH_(2)`
C. `O_(2)`
D. All of these

Explanation

### Step-by-Step Solution:

1. **Understanding the Z-scheme**: The Z-scheme is a model that describes the light-dependent reactions of photosynthesis, particularly the flow of electrons through the photosystems (PSII and PSI) and the associated energy transformations.

2. **Components of the Z-scheme**: The Z-scheme involves two main photosystems:
- **Photosystem II (PSII)**: Absorbs light energy, which excites electrons. Water molecules are split (photolysis), releasing oxygen and providing electrons.
- **Photosystem I (PSI)**: Absorbs light energy again, which further excites the electrons that have been transferred through the electron transport chain.

3. **Products of the Z-scheme**:
- **ATP Formation**: As electrons move through the electron transport chain from PSII to PSI, energy is released, which is used to pump protons into the thylakoid lumen, creating a proton gradient. This gradient drives ATP synthesis via ATP synthase.
- **NADPH Formation**: At PSI, the excited electrons are transferred to NADP+, reducing it to NADPH.
- **Oxygen Production**: The splitting of water molecules at PSII releases oxygen as a byproduct.

4. **Conclusion**: Therefore, during the Z-scheme of photophosphorylation, ATP, NADPH, and oxygen are all produced. Hence, the correct answer to the question is "all of these."

### Final Answer:
The correct option is **all of these** (ATP, NADPH, and Oxygen are all formed during the Z-scheme of photophosphorylation).

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