निम्न में से कौन सा संबंध सही है ?

Options

A. E=mc
B. `E = mc^(2)`
C. `E = 2mc^(2)`
D. `E = mc^(2)//4`

Explanation

To solve the question "निम्न में से कौन सा संबंध सही है?" (Which of the following relations is correct?), we will analyze the given options based on the principles of physics, particularly focusing on the famous equation derived from Einstein's theory of special relativity.

### Step-by-Step Solution:

1. **Identify the Key Equation**: The key equation we need to consider is Einstein's mass-energy equivalence formula, which is:
\[ E = mc^2 \]
Here, \(E\) represents energy, \(m\) represents mass, and \(c\) is the speed of light in a vacuum.

2. **Analyze the Options**: The options provided in the question are:
- \(E = mc^2\)
- \(E = 2mc^2\)
- \(E = \frac{mc^2}{4}\)
- \(E = mc^2\)

3. **Evaluate Each Option**:
- The first option \(E = mc^2\) is the original and correct equation.
- The second option \(E = 2mc^2\) suggests that the energy is double the mass-energy equivalence, which is not correct.
- The third option \(E = \frac{mc^2}{4}\) implies that energy is a quarter of the mass-energy equivalence, which is also incorrect.
- The fourth option is again \(E = mc^2\), which is correct.

4. **Conclusion**: Based on the analysis, the correct relation is:
\[ E = mc^2 \]
Therefore, the answer to the question is that the correct relationship is \(E = mc^2\).

### Final Answer:
The correct relation is \(E = mc^2\).

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