00:06The SI unit of frequency is A Hertz, B Decibel, C Kelvin, D Candela is, Kelvin is the unit
00:17of temperature, candela is the unit of intensity of light and Decibel is the unit of loudness.
00:26So, the correct option will be A Hertz, because the SI unit of frequency is Hertz and its sample
00:36is Hz, so the correct option will be A Hertz.
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