This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Upper lip is formed by the fusion of: 
Select and explain. 
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.
C: Maxillary, lateral nasal, median nasal process.
Answer: C: Maxillary, lateral nasal, median nasal process. 
Explanation: None