Which of the following would produce analog signals and which would produce digital signals?

Options

A. A vibrating tuning fork
B. Musical sound due to a vibrating sitar string
C. Light pulse
D. Output of NAND gate

Explanation

To determine which of the given options produce analog signals and which produce digital signals, we need to understand the characteristics of both types of signals.

### Step-by-Step Solution:

1. **Understanding Analog Signals:**
- Analog signals are continuous signals that vary in amplitude and can take any value within a given range. They are often represented by waveforms that can change smoothly over time.

2. **Understanding Digital Signals:**
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