Choose the correct statement.

Options

A. Gravitational force is a central force
B. Electromagnetic force is a central force
C. Nuclear force is a non-central force
D. All of these

Answer

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

### Step 1: Analyze Statement 1
**Statement 1:** Gravitational force is a central force.

- Gravitational force acts between two masses and is directed along the line joining the centers of the two masses.
- It follows the inverse square law, meaning the force decreases with the square of the distance between the masses.
- Since it acts along the line joining the masses, it is indeed a central force.

**Conclusion:** Statement 1 is true.

### Step 2: Analyze Statement 2
**Statement 2:** Electromagnetic force is a central force.

- Electromagnetic force acts between charged particles and also follows the inverse square law.
- Similar to gravitational force, it acts along the line joining the two point charges.
- Therefore, it is also a central force.

**Conclusion:** Statement 2 is true.

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

- Nuclear forces act between nucleons (protons and neutrons) in the nucleus.
- Unlike gravitational and electromagnetic forces, nuclear forces do not act along the line joining the centers of the nucleons; they can act at various angles and are dependent on the spatial configuration of the nucleons.
- This makes the nuclear force a non-central force.

**Conclusion:** Statement 3 is true.

### Final Conclusion
All three statements are true. Therefore, the correct option is D, which states that all the statements are true.

---