instruction:
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.
question:
Question: The following may occur in multimeric form associated with the J chain:
Options: <0> IgA and IgG. <1> IgD and IgM, <2> IdE and IgD. <3> IgA and IgD. <4> IgA and IgM.
answer:
biology

question:
Question: Only one of the following cell types synthesizes interleukin IL-12; which one?:
Options: <0> Cytotoxic T lymphocytes. <1> NK cells. <2> Myeloid dendritic cells. <3> Helper T lymphocytes. <4> Endothelial cells
answer:
pharmacology

question:
Question: The deoxyribonucleotides are synthesized:
Options: <0> From the ribonucleotide triphosphate. <1> From the ribonucleotides diphosphate. <2> From NADPH. <3> By oxidation of ribonucleotides. <4> For DNA polymerase III.
answer:
chemistry