A list of changes is given below. Identify their type and choose correct option. Boiling of egg. Making curd from milk Flowering of bud Making flour from grain

• A. (i), (ii), (iii) and (iv) are irreversible changes
• B. and (iv) are chemical changes
• C. (i), (ii), and (iv) are natural changes
• D. (ii), (iii) and (iv) are periodic changes