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 ILattice type III, C. Granular corneal dystrophy, D. All
A: Macular dystrophy
Answer: A: Macular dystrophy 
Explanation: Ans. Macular dystrophy