What is the correct order of star colors from hottest to coolest?

white, yellow, red, blue

yellow, orange, white, red

red, orange, yellow, blue-white

blue, white, yellow-white, orange

The correct answer is- blue, white, yellow-white, orange

Explanation:

According to the stellar classification stars are grouped into seven main types according to their temperature that are  O, B, A, F, G, K, and M. M are the coldest stars and O are the hottest stars.  

The color of these groups are in order- blue, blue-white, white, yellow-white, yellow, orange and red. This order is from hottest to coolest. The sun is the closest star from the earth and it comes under G star class. Therefore the correct order of star colors from hottest to coolest is blue, white, yellow-white, orange.

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