This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': "In Conn's syndrome the following is true: \nSelect and explain. \nA. Diastolic HTN without oedema, B. Systolic HTN without oedema, C. Pseudotetany, D. Hyper K+", 'role': 'user'}, {'content': "Answer: A \nExplanation: Answer is A (Diastolic hypeension without edema): Conn's syndrome is characterized by diastolic hypeension without edema.", 'role': 'assistant'}]