1.

The frequency of a sound :(a) determines its loudness(b) determines the extent of its shrillness(c) is measured in seconds (d) is measured in hertzWhich of the above statements are true ?(i) (a) & (b)(ii) (b) & (d)(iii) (a) & (d)(iv) (b) & (c)​

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ANSWER:

(II) (b) & (d)

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