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: Biochemistry
[{'content': 'The dielectric constant of water  is  ___. \nSelect and explain. \nA. 105, B. 78.5, C. 30, D. 60', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Water, a strong dipole, has high dielectric constant.\nThe dielectric constant for water is 78.5.\nIt decreases the force of attraction between charged and polar species relative to water free environments with lower dielectric constants.', 'role': 'assistant'}]