Read the following characteristics of an organism.
(I) Soft, dorsoventrally flattened, leaf-like body.
(ii) The Head lobe bears mouth surrounded by an oral sucker.
(iii) Absence of digestive system and sense organs.
(iv) Presence of excretory pore at the posterior end of the body.
(v) Considerable osmotic adaptability. Based on the above characteristics, identify the animal and select the correct option.