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Q)

Sound travels in air if

$\begin{array}{1 1} (a)\;\text{particles of medium travel from one place to another} \\ (b)\; \text{there is no moisture in the atmosphere} \\ (c)\; \text{disturbance moves} \\ (d)\; \text{both particle as well as disturbance travel from one place to another} \end{array}$

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