The correct statement(s) regarding sugars is(are)

Given: Specific rotations of L-($$-$$)-glucose and L-(+)-fructose are $$-52.5^\circ$$ and $$+92.5^\circ$$, respectively.

On treatment with $$\mathrm{HNO_3}$$, gluconic acid is oxidized to saccharic acid, whereas glucose is not oxidized to saccharic acid.

Fructose gives a positive Fehling's test because it isomerises to glucose and another aldohexose in the presence of Fehling's reagent.

Invert sugar is an equimolar mixture of D-glucose and D-fructose formed after hydrolysis of the corresponding disaccharide.

Specific rotation of invert sugar is $$-40^\circ$$.