An Antisense RNA Is an RNA That Base$-$Pairs with an mRNA and Prevents Its Translation One strategy to thwart the deleterious effects of genes activated in disease states $($such as cancer$)$ is to generate antisense RNAs in affected cells. Suppose the transcription of a cancer$-$activated gene yielded an mRNA whose sequence included the segment$\mathrm{ 5}9-$UACGGUCUAAGCUGA. Which of the following is the correct nucleotide sequence $(59$n$39)$ for the template strand in a DNA duplex that would code for an antisense RNA? $($Hint: Recall that the DNA strand that is not copied by RNA polymerase during transcription has a nucleotide sequence identical to that of the RNA being synthesized$\mathrm{ [}$except T residues are found in the DNA strand at sites where U residues occur in the RNA$]).$

a$.59-$ ATGCCAGATTCGACT

b$.59-$ TACGGTCTAAGCTGA

c$.59-$ TAGCGGTCTAAGCTGA

d$.59-$ TCAGCTTAGACCGCTA