Mark the correct option:

Options

A. The total charge of the universe is constant
B. The total positive charge of the universe is constant
C. The total negative charge of the universe is constant
D. The total number of charged particles in the universe is constant

Explanation

To solve the question, we need to analyze each of the four statements provided and determine which one is correct based on the principles of electrostatics and the conservation of charge.

### Step-by-Step Solution:

1. **Understanding the Conservation of Charge**:
- The law of conservation of charge states that electric charge cannot be created or destroyed in an isolated system. This means that the total charge in the universe remains constant.

2. **Evaluating Statement 1**:
- **Statement**: The total charge of the universe is constant.
- **Analysis**: This statement is true because, according to the conservation of charge, the total charge (positive and negative) in the universe does not change.

3. **Evaluating Statement 2**:
- **Statement**: The total positive charge of the universe is constant.
- **Analysis**: This statement is false. The total positive charge can increase or decrease due to various processes (like charging by friction, conduction, or induction).

4. **Evaluating Statement 3**:
- **Statement**: The total negative charge of the universe is constant.
- **Analysis**: This statement is also false. Similar to the positive charge, the total negative charge can also change due to the same processes mentioned above.

5. **Evaluating Statement 4**:
- **Statement**: The total number of charged particles in the universe is constant.
- **Analysis**: This statement is false. Charged particles can be created from neutral particles through various methods, meaning the total number of charged particles can change.

6. **Conclusion**:
- The only correct statement is **Statement 1**: The total charge of the universe is constant.

### Final Answer:
The correct option is **A**: The total charge of the universe is constant.