Match List-I with List-II and select the correct answer using the code given below the Lists : List-I (Element) A. Mg B. Ca C. Sr D. Ba List-II (Property/Use) 1. Gives red colour to flame 2. Sulphate compound used in medicine to examine the alimentary canal of a patient 3. Traps the energy of sunlight in photosynthesis 4. Control of muscle contraction
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