Which frequency range correctly lists HF, VHF, and UHF in order from lower to higher frequencies?

Which frequency range correctly lists HF, VHF, and UHF in order from lower to higher frequencies?

• A. 30-300 MHz
• B. 3-30 MHz
• C. 300 MHz-3 GHz
• D. 3-30 GHz

Answer: (B)

The idea is to know the standard ranges for these bands and then order them from lowest to highest frequency. HF runs from about 3 to 30 MHz, VHF from 30 to 300 MHz, and UHF from 300 MHz up to around 3 GHz. So, in increasing frequency, you’d start with HF, then VHF, then UHF. Among the given options, the 3–30 MHz range correctly identifies the HF band, which is the first element of that ascending sequence. The other options correspond to individual higher bands (VHF or UHF) or outside the HF/VHF/UHF grouping, so they don’t match the requested order as the first item.

The idea is to know the standard ranges for these bands and then order them from lowest to highest frequency. HF runs from about 3 to 30 MHz, VHF from 30 to 300 MHz, and UHF from 300 MHz up to around 3 GHz. So, in increasing frequency, you’d start with HF, then VHF, then UHF. Among the given options, the 3–30 MHz range correctly identifies the HF band, which is the first element of that ascending sequence. The other options correspond to individual higher bands (VHF or UHF) or outside the HF/VHF/UHF grouping, so they don’t match the requested order as the first item.