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
Sleep disturbances are diagnosed by -
assistant
The correct answer is  Ans. is 'a' i.e., Polysomnography * Polysomnography is an essential tool in the formulation of diagnoses for sleep disorder patients and in the enhancement of our understanding of normal sleep.