Given the task definition and input, reply with output. In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: Genes that are located on the same chromosome are called linked genes., Fact2: Genes and chromosomes exist in pairs., Question: What are genes located on the same pair? (A) fused (B) complex (C) nuclear (D) animals (E) cells (F) linked (G) offspring (H) alleles
F