Least porous soil is

The least porous soil among the following is a:

The least porous soil among the following is a:

Wood is classified as porous if it contains :

Diffuse porous wood is seen in …………..

___________ is a black porous solid obtained by the destructive distillation of wood.

In woody dicotyledons, the arrangement of vessels is either duffuse porous or ring porous. Bases on these data, which one of the following statement is correct