Which of the following modulations is used in data communication?

Which of the following modulations is used in data communication?

  1. a) Pulse Modulation
  2. b) Amplitude Modulation
  3. c) Phase Modulation
  4. d) Frequency Modulation

From the BREB Assistant General Manager (O&M / E&C) 2021 – Preliminary exam, question 40 of 48.

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