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: What type of epistasia explains the dihybrid phenotypic ratio of 13: 3 ?: 
 Options:  <1> Double dominant. <2> Simple recessive <3> Recessive dominant double. <4> Double recessive <5> Simple dominant.
