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Choose the correct option (a) Siderite → FeCO3 (b) Limonite → Fe2O3 (c) Calamine → ZnCO3 (d) a & c

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Choose the correct option 

(a)  Siderite → FeCO3 

(b)  Limonite → Fe2O3 

(c)  Calamine → ZnCO3 

(d) a & c 

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Correct option (d) a & c

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