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Tanmay singh from KPSI ATAL NAGAR , NAYA RAIPUR, RAIPUR
Subject :NSO    Class : Class 8

The sound wave with high frequency can be given by

A
B
C
D


Ans 1:

AARAV AGRAWAL from BIRLA DIVYA JYOTI, SILIGURI
Class : Class 8
BRO the question is wrong

Ans 2:

AARAV AGRAWAL from BIRLA DIVYA JYOTI, SILIGURI
Class : Class 8
Olympiad pls check

Ans 3:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
Sof please check

Ans 4:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8
B and D are similar images with same trough and crust

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