(A) Sound Column II (B) SONAR (1) Frequency (C) Reflection of sound (3) Finding depth of the sea...

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(A) Sound
Column II
(B) SONAR
(1) Frequency
(C) Reflection of sound (3) Finding depth of the sea
(D) Pitch
(4) Echo
(a) (A) \( \rightarrow \) (3) ; (B) \( \rightarrow \) (4) ; (C) \( \rightarrow \) (1) ; (D) \( \rightarrow \) (2)
(b) (A) \( \rightarrow \) (1); (B) \( \rightarrow \) (2); (C) \( \rightarrow \) (3); (D) \( \rightarrow \) (4)
(c) (A) \( \rightarrow \) (4) ; (B) \( \rightarrow \) (3); (C) \( \rightarrow \) (1) ; (D) \( \rightarrow \) (2)
(d) (A) \( \rightarrow \) (2) ; (B) \( \rightarrow \) (3) ; (C) \( \rightarrow \) (4) ; (D) \( \rightarrow \) (1)
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