Which of the following microprocessors is not 8bit microprocessor

The right answer for the question that is being asked and shown above is that: "4. 68000." the microprocessor that is not 8bit microprocessor is that 4. 68000

These are the following choices:
1. 8085
2. 6502
3. Z80
4. 68000
5. None of these

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.