Final answer:
The liver option (C) is the exception among the listed normal tissues as it is not typically highly susceptible to antineoplastic drugs due to a high rate of cell division.
Step-by-step explanation:
The tissues that are especially susceptible to the actions of antineoplastic drugs include those with high rates of cell division, such as hair follicles, bone marrow, and the gastrointestinal tract. However, the liver option (C) is not traditionally considered among the normal tissues that are highly affected by these drugs. Antineoplastic drugs target rapidly dividing cells, which is effective against cancer cells but also impacts normal cells in the hair follicles, bone marrow, and gastrointestinal tract that naturally have a high turnover. While the liver can be affected by toxicity from certain chemotherapy agents, it is not because of high cell turnover like the other tissues listed.