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What is the ITU designation range for VHF?

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What is the ITU designation range for VHF?

(a) 30 to 300 Kilohertz

(b) 300 to 3000 Kilohertz

(c) 30 to 300 Megahertz

(d) 3 to 30 Megahertz

I got this question in an interview for internship.

Question is from Time Domain Description topic in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications

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The correct option is (c) 30 to 300 Megahertz

Explanation: The VHF (Very High Frequency) are frequencies in the range of 30 MHz to 300 MHz. Frequencies in the range 30 to 300 Kilohertz belong to LF (Low Frequency) range, whereas frequencies in the range 300 to 3000 Kilohertz belong to MF (Medium Frequency) range. Frequencies in the range 3 to 30 Megahertz belong to HF (High Frequency) range.

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