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Assertion (A): Intermediate filaments are especially abundant in epithelial cells of the skin.
Reason (R): Such cells are subject to repeated mechanical stress and must resist tearing.

  • A.A is true but R is false
  • B.A is false but R is true
  • C.Both A and R are true, and R is the correct explanation of A
  • D.Both A and R are true, but R is not the correct explanation of A

Answer: C

Both are true and the reason accounts for the abundance: keratin filaments anchored at desmosomes distribute stress across a whole sheet of cells, and inherited faults in them cause skin that blisters at slight friction.

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