This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Biochemistry
[{'content': 'Normal plasma osmolality is \nSelect and explain. \nA. 285-300 milliosmo/kg, B. 310-340 milliosmo/kg, C. 200-240 milliosmo/kg, D. 160-180 milliosmo/kg', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The normal value of plasma osmolality is 285-300 mosm/kg.Osmolality is measured with an osmometer based on the depression of the freezing point of the sample.Patients with deficiency of ADH (Central diabetes insipidus) or a decreased response to ADH (Nephrogenic diabetes insipidus) will excrete urine with osmolality less than 300 mosmols/kg.Ref: D M Vasudevan 7th edition Page no: 373', 'role': 'assistant'}]