Which figure shows homologous chromosomes with homozygous alleles?

Correct answer would be option B.
Homologous chromosomes are those chromosomes that are similar in length, centromere location and, gene position. The position of a gene on each homologous chromosomes are same, however, it may contain different alleles.
One of the homologous pairs of a gene is derived from the mother and other from the father. The different form of the same genes is called as an allele.