Respuesta :
Answer:
a. Carbohydrates
Explanation:
Iodine is used to test for carbohydrates, specifically starch. Iodine changes color in the presence of starch from a brown color to a more blue black color. The answer is a bit untrue because other carbohydrates are tested differently but the closest one to the correct one (starch) is carbohydrates, which is one of many carbohydrates