Science, asked by jaybhanushali2007, 1 month ago

ok I am giving him hint

(1) Sonar
(2) Reverberation
(3) Echo
(4) None of these

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Answered by krrajurajput

1

Answer:

2

is right answer mere dost

Answered by JSP2008

1

It can be (2) or (4)...if I'm not wrong

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