The genes for same trait present on non homologous chromosomes are called allele.

Non-homologous chromosomes and genes for the same trait
Non-homologous chromosomes refer to chromosomes that do not have a similar structure or carry the same genes. In other words, they are not a pair of chromosomes that come together during sexual reproduction as homologous chromosomes do.

Alleles
Alleles are different forms or variants of a gene that occupy the same locus or position on homologous chromosomes. For example, in humans, there are multiple alleles for the gene that determines blood type (A, B, and O). However, alleles are not found on non-homologous chromosomes.

Linked genes
Linked genes are genes that are located close to each other on the same chromosome. These genes tend to be inherited together because they are physically linked and do not undergo independent assortment during meiosis. However, this question is specifically referring to genes located on non-homologous chromosomes, so linked genes would not be the correct answer.

Multiple alleles
Multiple alleles refer to the existence of more than two alleles for a particular gene in a population. Each individual still carries only two alleles, but there are more than two possible alleles in the population as a whole. For example, in humans, the gene for eye color has multiple alleles such as blue, brown, green, etc. However, multiple alleles are typically found on homologous chromosomes, not non-homologous chromosomes.

Explanation of the correct answer:
The correct answer is option 'D' - None of these. This is because neither alleles, linked genes, nor multiple alleles are applicable to genes present on non-homologous chromosomes. Non-homologous chromosomes do not carry the same genes or alleles for the same trait because they are not a pair of chromosomes that come together during sexual reproduction. Therefore, the genes for the same trait on non-homologous chromosomes are neither alleles, linked genes, nor multiple alleles.