The correct relation is :

Options

A. d = M x V
B. M = d x V
C. V = d x M
D. d=M + V

Answer

To solve the question regarding the correct relation among the given options, we need to understand the relationship between density, mass, and volume.

### Step-by-Step Solution:

1. **Understanding Density**:
- Density (D) is defined as the mass (m) of an object divided by its volume (V).
- The formula for density is:
\[ D = \frac{m}{V} \]

2. **Rearranging the Density Formula**:
- To find the mass in terms of density and volume, we can rearrange the formula:
\[ m = D \times V \]
- This means that mass is equal to density multiplied by volume.

3. **Evaluating the Options**:
- The first option states that \( D = m \times V \). This is incorrect because it does not follow the definition of density.
- The second option states that \( m = D \times V \). This is correct as it follows from the rearranged formula of density.

4. **Conclusion**:
- The correct relation is given by the second option:
\[ m = D \times V \]

### Final Answer:
The correct relation is: **m = D × V** (Option 2).

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