Anatomy Upper lip is formed by the fusion of: A Maxillary and lateral nasal process. B Lateral nasal and median nasal process. C Maxillary, lateral nasal, median nasal process. D Maxillary, mandibular, lateral nasal, median nasal process. 💡 Explanation Upper lip is formed by the fusion of: ✓ Correct Answer: C. Maxillary, lateral nasal, median nasal process.