Nuclear fusion produces ________

Options

A. Argon
B. Deuterium
C. Helium
D. Krypton

Explanation

**Step-by-Step Solution:**

1. **Understanding Nuclear Fusion**: Nuclear fusion is a process where two light atomic nuclei combine to form a heavier nucleus. This process releases a significant amount of energy.

2. **Identifying the Elements Involved**: In nuclear fusion, particularly in stars, isotopes of hydrogen such as protium (H-1), deuterium (H-2), and tritium (H-3) are commonly involved.

3. **Fusion Reaction Example**: A common fusion reaction involves deuterium nuclei. When two deuterium nuclei (H-2) fuse, they can produce helium (He-4) along with the release of energy.

4. **Analyzing the Options**: The options given are:
- a) Organ
- b) Deuterium
- c) Helium
- d) Krypton

5. **Selecting the Correct Answer**: Since the fusion of deuterium nuclei leads to the formation of helium, the correct answer to the question "Nuclear fusion produces ________" is **helium**.

**Final Answer**: Nuclear fusion produces **helium**.

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