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
Large vesicles that are >1cm in diameter is called as: 
Select and explain. 
A. Vesicles., B. Bullae., C. Pustule., D. None.
B: Bullae.
Answer: B: Bullae. 
Explanation: None