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Mark out the incorrect statement:

1. A free neutron can transform itself into photon
2. A free proton can transform itself into neutron
3. In beta minus decay, the electron originates from nucleus
4. All of the above

Correct answer: All of the above

Solution

Each statement is incorrect. A free neutron cannot simply become a photon; a free proton cannot turn into a neutron without additional energy and particle balance; and in beta minus decay, the electron is created in the decay process, not pre-existing inside the nucleus.

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