Swati classified a few changes occurring around us as shown in the table. No. Changes Type 1. Sharpening of pencil Physical, reversible 2. Evaporation of water Physical, irreversible 3. Opening of a bud Chemical irreversible 4. Rusting of iron Chemical reversible Which of the changes is/are classified correctly?

• A.  2 and 3 only   
• B.  3 and 4 only    
• C.  Energy changes take place in it.
• D.  3 only