greater omentum
During the development of the gut, there are two mesogastria attaching to the developing stomach: the dorsal mesogastrium and the ventral mesogastrium. Different organs begin to develop in each mesogastrium--the spleen and pancreas develop in the dorsal mesogastrium and the liver develops in the ventral mesogastrium. So, the structures involving the spleen and the posterior part of the developing stomach (which becomes the greater curvature) are derived from the dorsal mesogastrium. These include: the greater omentum (gastrophrenic ligament, gastrosplenic ligament, gastrocolic ligament) and splenorenal ligament. The structures involved with the liver and its attachment to the stomach wall form the ventral mesogastrium. These include the lesser omentum (hepatogastric ligament, hepatoduodenal ligament) and the ligaments of the liver (falciform ligament, coronary ligaments, right and left triangular ligaments). Of the answer choices, only the greater omentum is part of the dorsal mesogastrium.