This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure and function of protein, Subject name: Biochemistry
[{'content': 'Optical transmission through a solution depends on \nSelect and explain. \nA. Time, B. Concentration, C. Scale, D. Path length', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The amount of light that passes through a laboratory specimen. It can be used to measure the concentration of componentsin the specimen (e.g., the amount of solute contained in a solution).Ref: Textbook of Medical Biochemistry, D M VASUDEVAN', 'role': 'assistant'}]