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
Most aggressive variant of ameloblastoma: 
Select and explain. 
A. Granular., B. Follicular., C. Plexiform., D. Acanthomatous.
A: Granular.
Answer: A: Granular. 
Explanation: None