<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A group of investigators is studying the effects of aberrant protein isoforms on the pathogenesis of lung cancer. They observe that three protein isoforms are transcribed from the same 30,160 base-pair-long DNA segment on chromosome 13q. The canonical protein has a primary peptide sequence of 1186 amino acids. The second isoform has 419 amino acids and 100 amino acid sequence homology with the canonical protein. The third isoform has 232 amino acids and 92 amino acid sequence homology with the canonical protein. Which of the following is most likely responsible for the observed phenomenon?? A: Cytosine hypermethylation, B: Site-specific recombination, C: Alternative pre-mRNA splicing, D: RNA interference, E: Post-translational protein trimming,  <response>: This is a question about the molecular mechanisms that can generate protein isoforms from the same DNA segment. The key details are:- Three protein isoforms are transcribed from the same 30,160 base pair DNA segment. - The canonical protein has 1186 amino acids.- The second isoform has 419 amino acids and 100 sequence homology with the canonical protein. - The third isoform has 232 amino acids and 92 homology with the canonical protein.The different isoforms likely arise from the same DNA segment but have variations in length and slight sequence differences. This suggests the isoforms are generated by alternative splicing of the pre-mRNA transcribed from this DNA region. The other options would not explain how different isoforms are generated from the same DNA segment.C: Alternative pre-mRNA splicing 