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A sample of pure carbon dioxide, irrespective of its source contains `27.27%` carbon and `72.73%` oxygen. The data support

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A sample of pure carbon dioxide, irrespective of its source contains `27.27%` carbon and `72.73%` oxygen. The data support
A. Law of conservation of mass
B. Law of definite proportions
C. Law of reciprocal proportions
D. Law of multiple proportion s
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Correct Answer - B
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