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Q: Which instrument is used for discovering the things in water?
  • A. Laser
  • B. Radar
  • C. Sonar
  • D. Scuba
Correct Answer: Option C - SONAR (Sound Navigation and Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects under the surface of the water, such as other vessels.
C. SONAR (Sound Navigation and Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects under the surface of the water, such as other vessels.

Explanations:

SONAR (Sound Navigation and Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects under the surface of the water, such as other vessels.