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: Anaesthesia
Which of the following responses is least affected by Anaesthesia – 
Select and explain. 
A. Brainstem Auditory Evoked Response (BAER), B. Visual Evoked Response (VER), C. Somatosensory Evoked potential (SSEP), D. Electroencephalogram (EEG)
A: Brainstem Auditory Evoked Response (BAER)
Answer: A: Brainstem Auditory Evoked Response (BAER) 
Explanation: None