Propose an efficient synthesis for the following transformation. O د -- The transformation above can be performed with s

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Propose an efficient synthesis for the following transformation. O د -- The transformation above 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 HBr D HBr, ROOR G t-BUOK conc. H₂SO4, heat E H₂, Lindlar's cat. H dilute H₂SO4 C HCECNa F 1) O: 2) DMS 1 H₂. Pt