The correct option is D Untranslated regions (UTRs)
The Human Genome Project (HGP) is an international, scientific research project to understand the complete genetic makeup of human beings.
Sequence annotation is one of the methods considered in sequencing the human genome. It involves sequencing the whole set of the genome that contained all the coding (exons) and non-coding (introns) sequences, and later assigning different regions in the sequence with functions.
Bacterial artificial chromosome (BAC) and yeast artificial chromosome (YAC) were the vectors used in the cloning process in the Human Genome Project.
UTRs are untranslated regions present in the mRNA before start codon and after stop codon. They are needed for an efficient translation process.
Hence, the odd one out is UTRs.