Detailed Instructions: In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
Q: Question: Suppose that 40% of patients respond to treatment A. The average cost with A for the patients who respond is 2,000 per patient. The average cost with A for patients who do not respond is 5,000. What is the expected cost of treatment A for a patient ?:
Options: <0> 2,000 <1> 3200 <2> 3500 <3> 3,800. <4> 5,000
A:
pharmacology