Its not so clear formulated your question. You have got a specific plant you work on?
Anyway: the cotyledons of every dicotyledons are just plain simple leaves. The first pair of leaves might already be composed one. But maybe they are plain and not divided. Why is it important to you?
As recherching in the internet: gingseng has no real cotyledon. Why? Dont know. Anyway in the first year after germinating, thete is 1 leaf. A threefold leaf