The correct answer is:
A, neuronal cells! The neurons are very unlikely to become cancerous because they do not undergo division. Cancer is a misregulation of the cell cycle, and thus, it is likely to occur for any cell that is consistently dividing - as is the case for an alpha/beta pancreatic cells, intestinal epithelium cells, and skin cells. However, neurons tend to not divide (though new ones are consistently made via neurogenesis in the hippocampus), and thus, they are unlikely to become cancerous.
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