Choose the correct statement.

Options

A. Gravitational force is conservative
B. Electrostatic force is conservative
C. Nuclear force is non-conservative
D. All of these

Answer

To solve the question "Choose the correct statement," we need to analyze each of the three statements provided and determine their validity.

### Step 1: Analyze Statement 1
**Statement 1:** Gravitational force is conservative.

- The gravitational force acts between two masses and is defined as the force that attracts them towards each other.
- A conservative force is one where the work done by the force is independent of the path taken and depends only on the initial and final positions.
- For gravitational force, the work done only depends on the change in height (or distance) between the two masses, not the path taken.

**Conclusion:** This statement is true.

### Step 2: Analyze Statement 2
**Statement 2:** Electrostatic force is conservative.

- The electrostatic force acts between two charged particles and is defined by Coulomb's law.
- Similar to gravitational force, the work done by the electrostatic force depends only on the initial and final positions of the charges and not on the path taken.

**Conclusion:** This statement is also true.

### Step 3: Analyze Statement 3
**Statement 3:** Nuclear force is non-conservative.

- Nuclear forces are the forces that hold protons and neutrons together in an atomic nucleus.
- Theoretically, nuclear forces can be considered conservative, as they can be described by potential energy functions.
- However, in practical scenarios, the energy changes during nuclear reactions can be complex and path-dependent, making it difficult to account for all energy changes.

**Conclusion:** This statement is true in practical terms, as nuclear forces can behave non-conservatively due to the complexities involved.

### Final Conclusion
All three statements are true. Therefore, the correct answer is that all statements are correct.

---