Which of the following gives a blue colour with iodine?

Starch is a type of carbohydrate found in plants and their products. Sago powder is a plant product rich in starch. 

When a solution of iodine and potassium iodide is added to the starch-containing sago powder, the substance turns deep blue. This is because the starch combines with iodine to give a characteristic blue colour.

Sugar is rich in glucose, common salt is sodium chloride and chalk powder is calcium carbonate.