This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
The response which is graded by an observer on an agree or disagree continuum is based on - 
Select and explain. 
A. Visual analog scale, B. Guttman scale, C. Like scale, D. Adjective scale
C: Like scale
Answer: C: Like scale 
Explanation: .