A group of transposable elements described as ‘retroelements’ encompass

The correct answer is Option 3 i.e.Copia element in Drosophila; LINES as well as SINES in human

Concept:

• Retroelements: RNA- and reverse-transcribed-to-DNA elements that are inserted into a new location in the genome.
• In retrotransposons and retrovirus-like elements, there exist long terminal repeats (LTRs) that resemble those seen in retroviruses.
• LTRs are absent from retroposons like SHORT INTERSPERSED NUCLEOTIDE ELEMENTS and LONG INTERSPERSED NUCLEOTIDE ELEMENTS.
• SINEs and LINEs are two types of interspersed retrotransposable elements that use RNA intermediates to invade new genomic locations.
• SINEs and LINEs make up at least 34% of the human genome and are present in practically all eukaryotes (but not Saccharomyces cerevisiae).

​Explanation:

Option:- Copia element in Drosophila; LINES as well as SINES in human

• A retrotransposon called the Copia element is present in drosophila and is thought to have been horizontally transferred from some populations of Drosophila williston to Drosophila melanogaster. 
• LINES as well as SINES both are present in the genome of Humans.
• P transposable elements were found to be the root causes of the hybrid dysgenesis syndrome of genetic characteristics in Drosophila.
• The germline-specific short RNA piwi-interacting (piRNA) pathway is associated with a distinctive pattern of maternal inheritance seen in hybrid dysgenesis.

Therefore, option B is correct.