This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional Anesthesia, Subject name: Anaesthesia
The order of sensory blockade of local anesthesia is: 
Select and explain. 
A. Temperature - pain - touch - pressure, B. Pain - pressure - touch - temperature, C. Touch - pressure - temperature - pain, D. Touch - pain - pressure - temperature
A: Temperature - pain - touch - pressure
Answer: A: Temperature - pain - touch - pressure 
Explanation: Individual type of nerve differs in their minimal blocking concentration. Not all sensory and motor modalities are blocked equally by local anesthetics. This is termed differential blockade. For different fibers order of blockade b > AS = C > AU > A b > Aa autonomic > sensory> motor is the sequence of block. for sensory blockade the sequence is Temperature - pain - touch - pressure