Analyzing the spectra of stars, the hottest stars are:

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Red

Orange

Bluish white

There is no correlation between color and temperature

answer is C.

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Detailed Solution

Concept- We need to understand the relationship between the wavelength of a color and the temperature that results from it in order to answer this issue. We are aware of the relationship between temperature and color wavelength.
Wien's displacement rule may be used to determine the temperature of stars based on the stars' hues. The wavelength of the star's hue is inversely proportional to its temperature. The spectral lines of stars allow us to categorize them. Spectral variations caused by temperature As a result, for a given color of star, red has a longer or maximum wavelength and a therefore lower or smaller temperature range, whereas bluish white has a shorter or lesser wavelength and a consequently higher temperature range. Thus, the star that radiates the highest temperature is bluish-white in hue. Orange's color temperature ranges from 3500K to 5000K, hence, it is not a viable option.
Hence, the correct option is 3.

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