The correct option is B foot, seta and capsule
In liverwort, the sporophyte is differentiated into a foot, seta and capsule. Foot is the bottom part where the sporophyte is attached to the main body gametophye. Seta is the long stalk like structure and capsule is the structure at the top where spores are produced.
Thallus is the leaf-like structure while rhizoids are the root-like structures of the main body gametophyte.