Correct option is B
The coefficient of permeability for gravel is generally
between 1 and 100 cm/sec, which indicates that gravel allows water to pass through it easily due to its high permeability.
Less than 10⁻⁶ cm/sec: This range is too low for gravel and is more typical for clay.
Between 1 and 100 cm/sec: Correct, as gravel has a high permeability.
Between 1 × 10⁻⁶ and 1 × 10⁻³ cm/sec: This range corresponds to silt and fine sand, not gravel.
Between 0.001 and 1 cm/sec: Typical for medium to fine sand, not gravel.
Therefore, the correct answer is (b) Between 1 and 100 cm/sec.
