A student is given one compound among the following compounds that gives positive test with Tollen's reagent. The compound is :

Step-by-step solution

Tollen's reagent is a mild oxidizing agent that gives a positive test (silver mirror) with aldehydes and -hydroxy ketones. In cyclic structures, hemiacetals are in equilibrium with their open-chain hydroxy-aldehyde forms in aqueous solution, whereas acetals and ethers are stable and do not open up. Compound A is a cyclic acetal (specifically a methyl glycoside type structure). It is stable and does not show Tollen's test. Compound B is a cyclic ether with a methoxy group at a non-anomeric position. It is stable. Co