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  1. The transfer function C/R of the block diagram given below is—


    1. G1G2G3
      1 + G1G2G3H1

    2. G1G3 +
      G2
      1 + G2H1

    3. G1G2
      + G3
      1 + G1G2H1

    4. G1G2G3
      1 + G2H1
Correct Option: A

NA



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