Statement A: The gametophyte of Marchantia is dioecious
Statement B: Marchantia is heterosporous.

Marchantia is a dioecious species having male and female organs on different thalli. Female and male gametangia, are known as the 'archegonium' and ‘antheridium’ respectively. But the sporophyte produces same type of spores and hence they are homosporous.