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Question

In the core of a star, two nuclei fuse together to form.

A
hydrogen
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B
helium
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C
oxygen
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D
carbon
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Solution

The correct options are
A hydrogen
B helium
A star's energy is the result of a process known as thermonuclear fusion in which two hydrogen nuclei are combined together to form a helium nucleus, at extremely high pressure and temperature of about 107 K. During the fusion, an enormous amount of energy is released in the form of heat, light, and electricity.

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