Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: The genetic phenomenon that explains that the expression of a gene is influenced by the sex of the parent is: 
 Options:  <1> Character limited by sex. <2> Characteristic linked to sex. <3> Cytoplasmic inheritance. <4> Genomic imprint <5> Maternal genetic effect.
