$X \: \underleftarrow {HI} $ Glucose $ \underrightarrow {HNO_3}\: Y$

Question

What are X and Y?

              X                                       Y

(1) n-Hexane                 Gluconic acid

(2) Gluconic acid         Saccharic acid

(3) n-Hexanol               Saccharic acid

(4) n-Hexane               Saccharic acid