The spectral class does a star fit into if it has a surface temperature of 20 000 k is B and is denoted as option D.
What is Temperature?
This is defined as the degree of hotness or coldness of a substance and is influenced by heat.
B stars have temperatures between about 10,000 and 20,000K which is why it was chosen as the correct choice.
Read more about Stars here https://brainly.com/question/21379923
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