ध्वनि तरंगे नहीं चल सकती ह� – McqOptions

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1.	ध्वनि तरंगे नहीं चल सकती हैं -
A.	ठोस में
B.	द्रवों में
C.	गैसों में
D.	निर्वात में
Answer» E.

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