Study the two types of changes given below:
| A | B |
| Flowering of bud | Expansion of iron on heating |
| Cutting of grass | Boiling of water |
Which of the following is true?
1
A - Physical changes; B - Chemical changes
2
A - Chemical changes; B - Physical changes
3
A - Irreversible changes; B - Reversible changes
4
A - Irreversible changes, B - Irreversible changes