The correct option is A Presence of false septum
Due to false septum ovary become bilocular. On false septum, seeds are attached. This type of fruit is found in Cruciferae family. Eg. Brassica, Mustard.
In Brassica the ovary is unilocular in the beginning but it becomes bilocular due to the formation of a false septum (replum), because it is developed from the thalamus in place of wall of ovary.