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: They are involved in the lytic action of cytotoxic T lymphocytes:
Options: <0> Granzimas <1> Opsonins. <2> Histamines <3> Integrins <4> Cathepsins.

A: biology
****
Q: Question: They are fragments of the cytoplasm of a precursor cell:
Options: <0> Lymphocytes <1> Megakaryocytes <2> Monocytes <3> Platelets. <4> Erythrocytes

A: biology
****
Q: Question: Which of the following is a more reliable marker of malnutrition in the elderly patient?
Options: <0> Weight loss of 1 kg in the last month. <1> Body mass index greater than 24. <2> Difficulty swallowing, chewing and / or lack of appetite. <3> Albumin 4.5 gr / dl. <4> Mini Nutritional Assessment less than 17.

A:
medicine
****