*Question T1B07:
[97.305(a), (c)] Which of the following VHF/UHF band segments are limited to CW only?*  

*Correct Answer is  A: 50.0 MHz to 50.1 MHz and 144.0 MHz to 144.1 MHz*  

### AI Response: (may contain errors)  

To understand which VHF/UHF band segments are limited to CW (Continuous Wave) only, we need to look at the specific allocations defined by the FCC.

### Correct Answer: 
**A: 50.0 MHz to 50.1 MHz and 144.0 MHz to 144.1 MHz**

- **Explanation**: 
  - The frequency range from 50.0 MHz to 50.1 MHz (6 meters) and 144.0 MHz to 144.1 MHz (2 meters) are designated for CW operation only. This means that only Morse code (CW) transmissions are permitted in these segments, which is a common practice for weak signal work and DXing.

### Why the Other Choices are Incorrect:
- **B: 219 MHz to 220 MHz and 420.0 MHz to 420.1 MHz**:
  - These frequencies are not limited to CW. The 219-220 MHz band is primarily used for the 1.25-meter band, which allows various modes of operation, including voice and digital modes. The 420.0 MHz to 420.1 MHz segment is part of the 70 cm band, which also supports multiple modes, including FM and digital.

- **C: 902.0 MHz to 902.1 MHz**:
  - This frequency range is part of the 33 cm band and is not restricted to CW. It allows for various modes of operation, including voice and data transmissions.

- **D: All these choices are correct**:
  - This option is incorrect because not all the listed frequency ranges are limited to CW. Only the segments in choice A are CW-only.

### Summary:
- The only segments limited to CW are:
  - $50.0 \text{ MHz} \text{ to } 50.1 \text{ MHz}$
  - $144.0 \text{ MHz} \text{ to } 144.1 \text{ MHz}$

### Useful Rules of Thumb:
- Always check the latest FCC regulations for band allocations.
- Remember that certain bands are designated for specific modes, which can include restrictions to CW, voice, or digital modes.