system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
For a definitive diagnosis of mental retardation reduced level of intellectual functioning should be seen along with
assistant
The correct answer is  Reduced level of intellectual functioning resulting in diminished ability to adapt to the daily demands of the normal social environment as a diagnostic criteria in ICD, asks for IQ tests to be done with adaptive function assessment .