Read the given statements and choose the correct option. (I) Iron and sulphur are mixed to form a black and yellow mixture. (II) Mixture of iron and sulphur is heated to form a non-magnetic shiny grey substance.

• A. (I) is a chemical change
• B. (II) is a physical change
• C. Both are chemical changes
• D. (I) is a physical change and (K) is a chemical change