Mark the incorrect statement.

• A. Melting of wax is a physical change while burning of wax in a candle is a chemical change.
• B. Metals expand on heating while contract on cooling. Both are physical changes.
• C. Composition of matter changes during a chemical change while it remains same during a physical change.
• D. High and low tides in sea are the examples of non-periodic changes while growth of a tree is a periodic change.