The correct option is C Chara
The condition in which both male and female reproductive organs are present in the same individual is known as monoecious. Chara is a green alga which is monoecious.
Cycas circinalis (a gymnosperm), Carica papaya (an angiosperm) and Marchantia (a bryophyte) bear exclusively male and female reproductive structures on different individuals and are said to be dioecious.