Match the following pairs:
| Group A | Group B |
| a. Atomic theory | i. J. J Thomson |
| b. Discovery of protons | ii. Neil Bohr |
| c. Discovery of electrons | iii. Goldestin |
| d. Nobel prize for atomic structure | iv. John Dalton |
1
a-ii, b-i, c-iii, d-iv
2
a-i, b-ii, c-iii, d-iv
3
a-iv, b-iii, c-i, d-ii
4
a-iv, b-i, c-iii, d-ii