15 The pyrimidine thymine, present in DNA, was once thought to be A because A is analogous...

15 The pyrimidine thymine, present in DNA, was once thought to be A because A is analogous to benzene. In fact, thymine is B, which is also aromatic. Explain how B satisfies Huckel's rule, and write a contributing resonance structure for B that has a benzene-like ring.