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: Dental
Pulpal pain is most intense in 
Select and explain. 
A. Acute closed pulpitis, B. Acute open pulpitis, C. Pulp hyperaemia, D. Pulp necrosis
A: Acute closed pulpitis
Answer: A: Acute closed pulpitis 
Explanation: None