With which of the following does glucose $NOT$ react?

On heating with conc. $H_2SO_4$,sucrose gives

Which of the following pentoses exhibit optical activity?

$I$. $CHO-CH(OH)-CH(OH)-CH(OH)-CH_2OH$	$II$. $CHO-CH(OH)-CH(OH)-CH(OH)-CH_2OH$
$III$. $CHO-CH(OH)-CH(OH)-CH(OH)-CH_2OH$

(Note: The structures provided are $I$: Ribose,$II$: Arabinose,$III$: Xylose. All these are aldopentoses with chiral centers.)

From the given following ($A$ and $B$) cyclic structures, those which will not react with Tollen's reagent are :

Assertion : Hydrolysis of sucrose is known as inversion of cane sugar.
Reason : Sucrose is a disaccharide.

Glucose is a/an: