A) Pulsar
B) Sonar
C) Radar
D) Quasar
Correct Answer: B
Solution :
[b] Sonar (originally an acronym for Sound Navigation and Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.You need to login to perform this action.
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