A) fission of helium
B) chemical reaction
C) fusion of hydrogen nuclei
D) burning of carbon
Correct Answer: C
Solution :
The sun is continuously emitting light and heat at a very high rate. The source of the huge solar energy is the fusion of lighter nuclei. About 90% of the mass is composed of hydrogen and helium and rest 10% contains other elements. The temperature of interior of sun is very high. Continuous fusion of hydrogen nuclei into helium nucleus is taking place, which results in the liberation of huge amount of energy.
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