Assertion :Deposits of protein keratin are present in deeper layers of stratified keratinised squamous epithelium. Reason: Keratin makes this epithelium impervious to water.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Keratinised stratified squamous epithelium is a compound epithelium which covers the dry surface of skin. It has many layers of epithelial cells.
The deeper layers are formed by polygonal cells but superficial layers constitute horny, scale like remains of dead squamous cells.
Heavy deposits of the insoluble protein keratin in the dead superficial cells make the epithelium impervious to water and highly resistant to mechanical abrasions.
So, the correct answer isoption- B.

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