Which of these shrinks away from flame and burns with spluttering?

Options

A. Acrylic
B. Cotton
C. Silk
D. Wool

Explanation

To answer the question "Which of these shrinks away from flame and burns with spluttering?", we can follow these steps:

### Step-by-step Solution:

1. **Understanding the Properties of Materials**:
- We need to identify materials that exhibit specific behaviors when exposed to flame. The question specifies two behaviors: shrinking away from the flame and burning with a spluttering sound.

2. **Identifying the Material**:
- Among common synthetic fibers and plastics, we need to consider their reactions to fire. Acrylic is one of the synthetic fibers known for its behavior when burned.

3. **Behavior of Acrylic**:
- Acrylic shrinks away from the flame when exposed to heat. This is a characteristic of many synthetic fibers, but acrylic is particularly noted for this behavior.

4. **Burning Characteristics**:
- When acrylic burns, it produces a spluttering sound. This is due to the way it ignites and the combustion process it undergoes.

5. **Conclusion**:
- Based on the properties discussed, the answer to the question is **Acrylic**. It shrinks away from the flame and burns with a spluttering sound.

### Final Answer:
**Acrylic**

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