Task: Question Answering
Input (English): Question: The protection of a functional group, susceptible to hydrolysis, by the formation of a complex constitutes a procedure for stabilization of drugs in solution. Among the excipients used for this purpose are those that are made up of different glucose monomers with a cyclic arrangement and are called: 
 Options:  <1> Cyclodextrins. <2> Sorbitol <3> Citrates <4> Glucuronates <5> Propylene glycols
Output (English): 1