Least porous soil is

A. Clay soil

B. Sandy soil

C. Loam soil

D. Gravelly soil

Answer: Option A

Solution(By Examveda Team)

Least porous soil is Clay soil.
Clay is the most porous sediment but is the least permeable. Clay usually acts as an aquitard, impeding the flow of water. Gravel and sand are both porous and permeable, making them good aquifer materials. Porosity varies depending on particle size and aggregation.