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.

Let me give you an example: Question: A distension is defined as:
Options: <0> Soft tissue injury. <1> Forced movement of abrupt production. <2> Injury by stretching a muscle. <3> Injury of the joint capsule. <4> Interruption in the continuity of a bone.
The answer to this example can be: nursery
Here is why: Distension means Bloating and swelling in the belly area. It does not have much to do with chemistry, psychology, pharmacology, biology and medicine. Hence, the correct topic is nursery.

OK. solve this:
Question: He is presented with a cohort study involving 1000 female smokers and 2000 non-smoking women of the same age. If, after 5 years, 30 smokers and 20 nonsmoking women have experienced a stroke, what would be the relative risk and the attributable risk?
Options: <0> Relative risk = 3, attributable risk = 10 out of every 1000. <1> Relative risk = 3, attributable risk = 20 out of every 1000. <2> Relative risk = 1.5, attributable risk = 10 out of every 1000. <3> Relative risk = 1.5, attributable risk = 30 out of 1000. <4> Relative risk = 10 out of 1000, attributable risk = 3.
Answer:
medicine