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Communication Systems - Engineering

Q1:

Some advantages of optical fibre cables are
  1. small diameter
  2. Immunity to cross talk and EM interference
  3. Laser and LED modulation methods lend themselves ideally to digital operation
Which of the above are correct?

A 1 only

B 1 and 2

C 1, 2, 3

D 2, 3

ANS:C - 1, 2, 3

Fibre optic cables have all these advantages.