Propose an efficient synthesis for the given transformation. OH OH O"-ox This transformation can be performed with some reagent or combination of the reagents listed below. Give the necessary reagent(s) in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. A B D E ,H2SO4 1) & ; 2) 1) 2:2) H30+ Mg H2, Lindlar's cat. H30+ G H 1 NaH Br2, hv HBr (xs), heat 1) HCECNa; 2) H30+ MCPBA (RCO3H) K L M N 0 MeONA DMP or PCC SOCI2, pyridine H2SO4, H20, HgSO4 1) R2BH; 2) H202, NaOH GB