Name the carcinogens present in cigarette smoke.

Explanation

### Step-by-Step Solution:

1. **Understanding Carcinogens**:
- Carcinogens are substances that can lead to cancer. They can be chemicals, biological agents, or radiation that have the potential to cause cancer in living tissue.

2. **Cigarette Smoke Composition**:
- Cigarette smoke contains approximately 7,000 different chemicals. Out of these, around 250 are known to be harmful and can cause cancer.

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