Which row gives the observation when a few drops of aqueous P are added to concentrated aqueous Q?
- AP: acidified potassium manganate(VII); Q: sodium sulfite; observation: purple solution
- BP: sodium hydroxide; Q: zinc chloride; observation: white precipitate
- CP: ammonia; Q: potassium carbonate; observation: fizzing
- DP: barium chloride; Q: iron(III) sulfate; observation: brown precipitate