This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal tract, Subject name: Pediatrics
[{'content': 'Which of the following is not a reliable indicator of dehydration \nSelect and explain. \nA. Skin turgor, B. Dry buccal mucosa, C. Oliguria, D. Thirst', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Skin turgor (elasticity) has its limitations when assessing hydration status in the elderly. Reference: GHAI Essential pediatrics, 8th edition', 'role': 'assistant'}]