Solve this multiple-choice question and choose the correct option.

Radio spectrum (HF band): What frequency range defines the High Frequency (HF) band? Provide the ITU/RF engineering standard limits. Choose the correct range.

Difficulty: Easy

300 kHz to 3 MHz
3 MHz to 30 MHz
30 MHz to 300 MHz
300 MHz to 3 GHz

Correct Answer: 3 MHz to 30 MHz

Explanation:

ConceptThe ITU designates HF as 3–30 MHz, supporting skywave propagation and long-distance communication.

Final Answer3 MHz to 30 MHz

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