Correct Answer: lodine solution

Solution : The correct option is the Iodine solution .

Using a chemical reaction, the iodine-starch test may determine if starch or iodine is present. Iodine creates a blue-black complex when it interacts with starch. The test is performed by dabbing a sample with a few drops of iodine solution; if the sample contains starch, it becomes blue-black. In biology and chemistry, the iodine-starch test is commonly used to detect starch in a wide range of materials, including food, plants, and laboratory solutions.