The upper lip is derived from
Maxillary prominence and mandibular prominence
Maxillary prominence and medial nasal prominence
Maxillary prominence and lateral nasal prominence
Mandibular prominence and medial nasal prominence
The upper lip is formed by the fusion of two maxillary prominences with the two medial nasal prominences Ref : Langman's Medical Embryology 14e pg 295,298.
General anatomy