The correct option is A Both the statements are true and statement - 2 is the correct explanation of statement - 1
The specific gravity of a substance is defined as the density of the substance divided by the density of water at 4∘C. Therefore, the units of density cancel each other, and the term specific gravity becomes dimensionless quantity.
Specific gravity=Density of substanceDensity of water at 4∘C
Therefore, both statement-1 and statement-2 are correct and statement-2 is the correct explanation of statement-1.