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: Ophthalmology
Which of the following is the least common corneal dystrophy 
Select and explain. 
A. Macular Dystrophy, B. Lattice type I, C. Lattice type III, D. Granular Corneal Dystrophy
A: Macular Dystrophy
Answer: A: Macular Dystrophy 
Explanation: A i.e. Macular Dystrophy