नीचे दिए गए विकल्पों में स� – McqOptions

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1.	नीचे दिए गए विकल्पों में से किसमें ध्वनि आर - पार नहीं जा सकती है -
A.	पानी
B.	निर्वात
C.	लोहा
D.	वायु
Answer» C. लोहा

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