This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Vidian nerve passes through 
Select and explain. 
A. Inferior orbital fissure, B. Incisive foramen, C. Tympanomastoid fissure, D. Pterygoid canal
D: Pterygoid canal
Answer: D: Pterygoid canal 
Explanation: In the anterior pa of the foramen lacerum,the greater petrosal nerve unites with the deep petrosal nerve to form the nerve of the pterygoid canal(the vidian nerve)which leaves the foramen by entering the pterygoid canal in the anterior wall of the foramen lacerum. REF.BDC VOL.3,FIFTH EDITION