<prompt> Memory impairment is most likely to occur in:Downs SyndromeAlkaptonuriaAttention deficit disorderConduct disorder  <response>: Answer is A Downs syndrome Down Syndrome is associated with memory impairment. Adults with trisomy 21 Downs consistently develop the neuropathologic hallmarks of Alzheimers disease of they survive beyond 40 years of age - Harrison s The most noble aspect is downs syndrome is marked mental retardation, relatively poor expressive language and impaired verbal sho term memory - Child and Adolescent Psychiatry 