The correct option is D Marchantia
A thalloid body is one which is not well-differentiated into different organs. A thalloid plant body is a characteristic feature of liverworts. Marchantia is an example of a liverwort.
Mosses, on the other hand, do not have a thalloid body. They have leaf-like, stem-like, and root-like structures. Examples of mosses are Funaria, Polytrichum, and Sphagnum.