You will be given a definition of a task first, then some input of the task.
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: The genetic phenomenon that explains that the expression of a gene is influenced by the sex of the parent is:
Options: <0> Character limited by sex. <1> Characteristic linked to sex. <2> Cytoplasmic inheritance. <3> Genomic imprint <4> Maternal genetic effect.
Output:
biology