In ________ instruments, a vibrating air column produces sound.

Options

A. winged
B. string
C. percussion
D. None of them

Answer

To solve the question, "In ________ instruments, a vibrating air column produces sound," we need to analyze the types of musical instruments provided in the options: wind, string, percussion, and none of them.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the type of instrument that produces sound through a vibrating air column.

2. **Analyzing the Options**:
- **Wind Instruments**: These instruments produce sound when air is blown into them, causing a column of air to vibrate. Examples include flutes, trumpets, and clarinets.
- **String Instruments**: These instruments produce sound through the vibration of strings, such as violins and guitars. They do not rely on air columns for sound production.
- **Percussion Instruments**: These instruments produce sound through the striking or shaking of a body, such as drums and tambourines. They also do not involve a vibrating air column.
- **None of Them**: This option implies that none of the previous categories fit the description.

3. **Identifying the Correct Answer**: Based on the analysis:
- Wind instruments are the only category that produces sound through a vibrating air column.

4. **Final Answer**: Therefore, the correct answer is "wind".