Choose the correct statement.

Options

A. Strong nuclear force is mediated by the particle `'pi`-meson'
B. Weak nuclear force is mediated by the particle 'Boson'
C. Electromagnetic force is mediated by the particle 'photon' and gravitational force is mediated by the particle 'graviton'
D. All of these

Answer

To solve the question, we need to analyze each of the three statements provided and determine their correctness.

### Step-by-Step Solution:

1. **Analyze Statement 1**:
- The statement claims that the strong nuclear force is mediated by the particle "by mission."
- The correct term should be "mesons" (not "by mission"). The strong nuclear force is indeed mediated by particles called mesons, particularly pions, which are exchanged between nucleons (protons and neutrons) in the nucleus.
- **Conclusion**: This statement is **true** (with the correction of the term).

2. **Analyze Statement 2**:
- The statement claims that weak nuclear forces are mediated by particle bosons.
- The weak nuclear force is indeed mediated by W and Z bosons. The W bosons are responsible for processes involving charged particles, while Z bosons mediate interactions involving neutral particles.
- **Conclusion**: This statement is **true**.

3. **Analyze Statement 3**:
- The statement claims that the weak electromagnetic force is mediated by the particle photon.
- This statement is misleading; it should refer to the electromagnetic force, which is indeed mediated by photons. However, the term "weak electromagnetic force" is not standard terminology. The electromagnetic force is distinct from weak nuclear force.
- **Conclusion**: This statement is **false** as it mislabels the forces.

4. **Final Conclusion**:
- Since Statement 1 and Statement 2 are true, but Statement 3 is false, the correct answer to the question "Choose the correct statement" is that not all statements are correct.
- Therefore, the answer is **none of the above** or **only statements 1 and 2 are correct**.