<prompt> Patients suffering from which of the following disease as per ICDDSM criteria are eligible for disability benefit as per the National Trust Act?SchizophreniaBipolar disorderDementiaMental retardation  <response>: National Trust Act 1999 is an act to provide for the constitution of a body at the national level for the welfare of persons with Autism, Cerebral palsy, Mental retardation, and Multiple disabilities and for matters connected therewith or incidental thereto. 