Which is the disadvantage of Optical Fiber?

Which is the disadvantage of Optical Fiber?

  1. a) Resistance to corrosive materials
  2. b) Greater immunity to tapping
  3. c) Unidirectional light propagation
  4. d) None of these

From the Combined Bank Assistant Engineer (IT) 2020 – Preliminary exam, question 33 of 37.

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