Answer: Option (2)
Explanation: Density refers to the mass of any substance per unit volume and its unit is gram/cm³ . Whereas, the ratio between material's density to the water density is generally termed as specific gravity. It has no unit.
The value of density and specific gravity is almost equal as the density of water is taken to be 1 gram/cm³.
In the given condition, basalt has a density greater than granite, so from the above mentioned relation between density and specific gravity of any substance, we can consider that specific gravity of basalt is greater than granite.
Thus, the correct answer is option (2).
