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Question

The speed of an electromagnetic wave through a medium, depends upon

(i) permittivity of the medium

(ii) permeability of the medium

(iii) density of the medium

(iv) physical state of the medium

A
(i), (ii) and (iii)
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B
(i) and (ii)
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C
(i) and (iii)
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D
(ii) and (iii)
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