A polysaccharide 'X' on boiling with dil H₂SO₄ at 393 K under 2-3 atm pressure yields 'Y'. 'Y' on treatment with bromine water gives gluconic acid. 'X' contains -glycosidic linkages only. Compound 'X' is :
JEE Main 2022 · 24 Jun, Morning shift · Q177