As compared to \(^{12}\mathrm{C}\) atom, \(^{14}\mathrm{C}\) atom has:
| 1. | two extra protons and two extra electrons |
| 2. | two extra protons but no extra electron |
| 3. | two extra neutrons and no extra electron |
| 4. | two extra neutrons and two extra electrons |
| 1. | burning of hydrogen in the oxygen |
| 2. | fission of uranium present in the sun |
| 3. | fusion of protons during synthesis of heavier elements |
| 4. | gravitational contraction |