*Question G8C04:
Which of the following describes Baudot code?*  

*Correct Answer is  C: A 5-bit code with additional start and stop bits*  

### AI Response: (may contain errors)  

Baudot code is a character encoding system used in telegraphy and data communication. Let's break down the question and the choices.

### Correct Answer: A
**Explanation:**
- Baudot code is indeed a 5-bit code. It represents characters using 5 bits, which allows for 32 different combinations (from 00000 to 11111).
- In addition to the 5 bits used for the actual data, Baudot code includes start and stop bits to frame the data for transmission. This framing is essential for ensuring that the receiving end can correctly interpret the beginning and end of each character.

### Why the Other Choices are Incorrect:
- **B: A code using error detection and correction**
  - While some coding systems do include error detection and correction, Baudot code itself does not inherently provide these features. It is primarily a simple encoding scheme without built-in error correction.

- **C: A 5-bit code with additional start and stop bits**
  - This choice is misleading because it states "A 5-bit code" but does not specify that it is indeed a 5-bit code. The correct answer should clearly state that it is a 5-bit code with start and stop bits, which is what option A does.

- **D: A code using SELCAL and LISTEN**
  - SELCAL (Selective Calling) and LISTEN are not related to Baudot code. SELCAL is a system used in aviation for alerting pilots to incoming messages, while LISTEN refers to a method of monitoring frequencies. Neither of these concepts pertains to the Baudot code itself.

### Summary:
- Baudot code is a 5-bit code with start and stop bits, making option A the correct choice.
- Understanding the structure of Baudot code is crucial for recognizing its application in communication systems. 

This knowledge will help you in the Extra Class exam and in practical amateur radio operations.