Study the given Venn diagram carefully and identify P, Q, R and S.
| P | Q | R | S | |
| A | Milk | Honey | Shampoo | Petrol |
| B | Kerosene | Plasticine | Honey | Olive oil |
| C | Butter | Spirit | Shampoo | Honey |
| D | Camphor | Soap solution | Fruit jelly | Mustard oil |
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