Spectrum Bands Matching (VHF, UHF, SHF, MF) Match each frequency to its standard radio band designation.

Introduction / Context:
This matching question checks recognition of standard radio-frequency band names used in communications and radar. Knowing which numeric ranges map to MF (medium frequency), VHF (very high frequency), UHF (ultra high frequency), and SHF (super high frequency) is essential for antenna selection, propagation expectations, and regulatory allocations.

Given Data / Assumptions:

• A: 200 MHz
• B: 20 GHz
• C: 500 kHz
• D: 500 MHz
• Band labels available: MF, VHF, UHF, SHF

Concept / Approach:

Standard ITU-style band naming places MF from 300 kHz to 3 MHz, VHF from 30 MHz to 300 MHz, UHF from 300 MHz to 3 GHz, and SHF from 3 GHz to 30 GHz. We simply compare each given frequency against these brackets and assign the correct band.

Step-by-Step Solution:

Verification / Alternative check:

Cross-recognize common services: FM broadcast and airband live in VHF; mobile and Wi-Fi bands often fall in UHF/SHF; AM broadcast sits in MF. This sanity check corroborates the mapping.

Why Other Options Are Wrong:

Options that place 200 MHz outside VHF, 20 GHz outside SHF, 500 kHz outside MF, or 500 MHz outside UHF conflict with widely accepted band boundaries.

Common Pitfalls:

Confusing UHF and SHF at the 3 GHz boundary, or assuming AM broadcast (MF) extends to tens of MHz.

Final Answer:

A-3, B-1, C-4, D-2