Study the given Venn diagram. If (i) is curdling of milk, (ii) is ripening of fruits, (iii) is volcanic eruptions and (iv) is spoilage of food, then which of the following best identifies P, Q, R and S?
| P | Q | R | S | |
|---|---|---|---|---|
| A | Chemical change |
Irreversible change |
Periodic change |
Fast change |
| B | Physical change |
Periodic change |
Non-periodic change |
Slow change |
| C | Periodic change |
Desirable change |
Non-periodic change |
Fast change |
| D | Desirable change |
Non-periodic change |
Undesirable change |
Slow change |
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