Question

Solar energy is mainly caused due to -

• A. fusion of protons during synthesis of heavier elements.
• B. gravitational contraction.
• C. burning of hydrogen in the oxygen.
• D. fission of uranium present in the sun.

Answer 1

The correct option is A fusion of protons during synthesis of heavier elements.

In the sun, a huge amount of energy is produced due to fusion of $4$ protons (hydrogen nucleus) into a helium nucleus.

​​​​​​​Hence, option $\left(A\right)$ is the correct answer.