Relationship between porosity and capillarity is that:

Correct option is C

· Capillary rise formula:

Thus:
· r↓ → h↑ (smaller pores give higher capillary rise).
· Fine-textured soils (clays) → higher capillarity.
Why other options are wrong
· (a) Porosity alone not important; pore size distribution matters.
· (b) Larger pores reduce capillary rise.
· (d) Strong relationship exists.