The volume of a colloidal particle, V_c as compared to volume of solute particle V_s, in a true solution could be

Correct option is B. VcVs=10³
For a true solution, the diameter range is 1 to < 10 Å, and for colloidal solution, diameter range is 10-1000 Å.
Taking lower limits,
VcVs=Rc³/Rs³
We know, rc=10/2=5Å
rs=1/2=0.5Å
VcVs=10³