From the sugars shown below, which one will not give a positive test with Tollens reagent? 
Definitions:
Unfamiliar Stimulus
A new or unknown stimulus that has not been previously encountered by an individual, often triggering a learning or adaptation process.
Reward Theory
A psychological principle suggesting that behaviors are motivated by the rewards they produce.
Mere Exposure Effect
An occurrence in psychology where people begin to favor things just because they have been exposed to them before.
Similar To Us
A psychological phenomenon where individuals are more likely to form connections with or feel positive towards others who share similar characteristics or beliefs.
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