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: Pathology
Vertical measure in mm from granular cell layer to the deepest part of tumour used in Melanoma for prognosis is 
Select and explain. 
A. Breslow s method, B. Clarks s method, C. Thomas method, D. Ashpit s method
A: Breslow s method
Answer: A: Breslow s method 
Explanation: Breslow s thickness less than 1.7mm carries favorable prognosis.