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      Question

      In SONAR, we

      use
      A ultrasonic waves Correct Answer Incorrect Answer
      B infrasonic waves Correct Answer Incorrect Answer
      C radio waves Correct Answer Incorrect Answer
      D audible sound waves Correct Answer Incorrect Answer

      Solution

      Sonar (sound navigation and ranging) is a technique that uses sound propagation to navigate (usually under water, as in submarine navigation), communicate with or detect objects on or under the surface of the water, such as the vessels as ultrasonic waves which is used having very high frequency > 20,000 Hz.

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