In fusion reaction of sun which element isotopes are used:

Explanation

In the fusion reactions that occur in the sun's core, the primary elements involved are hydrogen isotopes. Specifically, the sun undergoes a process called nuclear fusion in which hydrogen nuclei (protons) combine to form helium nuclei. This fusion process releases a tremendous amount of energy in the form of light and heat, which is what powers the sun and provides us with sunlight and heat on Earth. The most common fusion reaction in the sun involves the isotopes of hydrogen: Proton-Proton Chain: This is the dominant fusion process in the sun. It involves the isotopes hydrogen-1 (1H) and deuterium (2H) in a series of steps that ultimately lead to the formation of helium-4 (4He). So, neither oxygen, carbon, nor uranium is primarily involved in the fusion reactions within the sun. The energy generation in the sun is primarily driven by the fusion of hydrogen isotopes.