Final answer:
Firearms are the item that you would not expect to find in a supermarket.
Step-by-step explanation:
Out of the options given, the item for which you would not expect to find in a supermarket is firearms. Alcohol, gasoline, and groceries are commonly found in supermarkets, but firearms are typically sold at specialized stores or licensed dealers. Supermarkets focus on providing a wide range of food and household products, so it is unlikely to find firearms in their inventory.
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