Consider the following advantages of the Optic Fibers and the Copper wires: 

  1. Optic Fibers are NOT susceptible to the electrical interference 
  2. Optic Fibers can be used to transmit more signals that Copper Wires 
  3. Optic Fibers can carry a signal over a single fiber, unlike the electricity which requires a pair of Copper wires. 

Which among the above stand correct ?

[A] Only 1 is correct
[B] Only 1 & 2 are correct
[C] All 1, 2 & 3 are correct
[D] Only 3 is correct
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