9.Consider the following pairs: Strontium carbonate – Red fireworks Barium chloride – Green fireworks Copper chloride – Blue fireworks Sodium nitrate – Yellow fireworks    Which of the above are correct? [A] 1 & 2 Only [B] 2 & 3 Only [C] 1, 2 & 3 Only [D] 1, 2, 3 & 4

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