Rock the Red Seal Cosmetology Exam 2026 – Style Your Future with Confidence!

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What elements make up human hair?

CHONS

COHNS

Human hair is primarily made up of the protein keratin, which is composed of carbon, hydrogen, oxygen, nitrogen, and sulfur. Therefore, the correct element order is C-H-O-N-S, making option B the correct answer.

Option A is incorrect because the elements are not listed in the correct order.

Option C is incorrect because it has an extra "S" at the end.

Option D is incorrect because it has "HON" which is not in the correct order.

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COSHN

HONCS

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