In one form of the disease called macular degeneration, eyesight decreases due to overproduction of new blood vessels (angiogenesis [an-jee-oh-JEN-uh-sis]) in the eye. Inhibition of a gene involved in angiogenesis can be achieved by introducing which of the following forms of complementary RNA molecule into the eye?

W) siRNA

X) Messenger RNA

Y) lncRNA

Z) Transfer RNA
W) siRNA