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
Brain cannot utilize -
assistant
The correct answer is  Alts, is 'b' i.e., Fatty acids There is no stored fuel in brain2, but it utilized 60% of total energy under resting conditionsQ.Glucose is virtually the sole fuel for the brain2, except in prolonged starving when ketone bodies are the majorsourceQ.Fatty acids do not serve as fuel for the brain, because they are bound to albumin in plasma; hence cannot cross blood-brain barrier.