Zeroth law of thermodynamics gives the concept of

Options

A. internal energy
B. heat content
C. pressure
D. temperature

Explanation

To solve the question regarding the Zeroth Law of Thermodynamics, we will analyze the options provided and explain the concept step by step.

### Step-by-Step Solution:

1. **Understanding the Zeroth Law of Thermodynamics**:
- The Zeroth Law states that if two systems are each in thermal equilibrium with a third system, then they are in thermal equilibrium with each other. This implies that they are at the same temperature.

2. **Identifying the Concept**:
- The key concept derived from the Zeroth Law is temperature. It establishes a fundamental relationship that allows us to define temperature in a consistent manner.

3. **Evaluating the Options**:
- The options provided are internal energy, heat content, pressure, and temperature.
- Internal energy and heat content are related to the energy of the system but do not define thermal equilibrium.
- Pressure is a measure of force per unit area and does not directly relate to thermal equilibrium.
- Temperature is the only option that directly relates to the concept of thermal equilibrium as defined by the Zeroth Law.

4. **Conclusion**:
- Based on the explanation, the correct answer is temperature. Therefore, the Zeroth Law of Thermodynamics gives the concept of temperature.

### Final Answer:
The Zeroth Law of Thermodynamics gives the concept of **temperature**.

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