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Correct answer: A
Explanation
Specific gravity is a dimensionless quantity representing the ratio of a substance's density (or specific weight) to that of water at standard conditions. It does not have a fixed value like 1.0 for all liquids; it varies depending on the liquid. However, in the context of this MCQ, option A (1.0) is likely intended as the reference point or a common simplification for water itself, making it the most plausible answer among the choices provided.