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
Nerve fibres in pulp are 
Select and explain. 
A. Sympathetic efferent post ganglionic, B. Parasympathetic post ganglionic, C. Motor fibres, D. Both autonomic parasympathetic and sympathetic fibres
A: Sympathetic efferent post ganglionic
Answer: A: Sympathetic efferent post ganglionic 
Explanation: None