Final answer:
Olanzapine is not effective in treating enuresis in childhood, while the other listed options such as Desmopressin, Bell-and-pad conditioning, Amitriptyline, and Imipramine are established treatments for this condition.
Step-by-step explanation:
Among the options provided for treating enuresis in childhood, Olanzapine is not considered an effective treatment. Enuresis, commonly known as bedwetting, is a condition typically managed with methods such as Desmopressin, which is a synthetic hormone used to reduce urine production at night; Bell-and-pad conditioning, a behavioral technique that uses an alarm triggered by wetness to condition the child against bedwetting; and medications like Amitriptyline and Imipramine, which are tricyclic antidepressants with anticholinergic properties that can help reduce the symptoms of enuresis. Olanzapine, an atypical antipsychotic, is not used for this condition and thus does not fit with the rest of the options, which are established enuresis treatments.