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    Question

    'SONAR' is mostly used by -

    A Doctors Correct Answer Incorrect Answer
    B Engineers Correct Answer Incorrect Answer
    C Astronauts Correct Answer Incorrect Answer
    D Navigators Correct Answer Incorrect Answer

    Solution

    a method or device for detecting and locating objects especially underwater by means of sound waves sent out to be reflected by the objects also : a device for detecting the presence of a vessel (such as a submarine) by the sound it emits in water.

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