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The question is asking you to match a list of scientists (List I) with their respective discoveries (List II). You need to choose the correct answer using the given codes.
Let`s look at each option:
Option 1: 1 2 3 4 1
According to this option, the discoveries made by the scientists are:
- Goldstein discovered the proton
- Chadwick discovered the neutron
- JJ Thomson discovered the electron
- John Dalton developed the atomic theory
This option matches the scientists with their discoveries correctly, so it could be the correct answer.
Option 2: 2 2 4 3 1
According to this option, both Goldstein and Chadwick discovered the proton, which is incorrect. Each scientist should be matched with a different discovery. Therefore, this option is incorrect.
Option 3: 1 4 3 2
According to this option, Goldstein discovered the atomic theory, which is incorrect. Goldstein did not propose the atomic theory; John Dalton did. Hence, this option is incorrect.
Option 4: 1 3 4 2
This option does not follow the order of the given lists. It should match John Dalton with the atomic theory, which it does not