An organic compound X with molecular formula `C_(11)H_(14)` gives an optically active compound on hydrogenation. Upon ozonolysis, X produces a mixture of compunds - P and Q, Compund P gives a yellow precipitate when treated with `I_2` and NaOH bu does no reduce Tollens' reagent. Compound Q does not gives any yellow precipitate with `I_2` and NaoH but gives Fehling 's test. The compund X Q does not give any yellow precipitate with `I_2` and NaOH but gives Fehling 's test . The compund X is

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