This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Symptoms & Signs , Subject name: Psychiatry
[{'content': 'Visual analog scale is a - \nSelect and explain. \nA. Pain scale, B. Pressure scale, C. Vision scale, D. Auditory scale', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Pain scale Visual analog Scaleo The visual analogue scale or visual analog scale (VAS) is a psychometric response scale which can be used in questionnaires.o It is a measurement instrument for subjective characteristics or attitudes that cannot be directly measured,o When responding to a VAS item, respondents specify their level of agreement to a statement by indicating a position along a continuous line between two end-points,o VAS is the most common pain scale for quantification of severity of pain.", 'role': 'assistant'}]