Is it legal to carry a loaded firearm in a vehicle in Iowa without a permit?

Although Iowa is a state with relatively lenient gun laws, it is still illegal to carry a loaded firearm in a vehicle without a permit. Option A is incorrect because there are certain restrictions and regulations in place for carrying a firearm in Iowa. Option B is incorrect because open carry laws only apply to carrying firearms in public places, not inside a vehicle. Option D is also incorrect because, even if the firearm is not accessible, it is still illegal to carry it without a permit. Therefore, the only correct answer is C - it is illegal to carry a loaded firearm in a vehicle in Iowa without a permit.