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: Social & Preventive Medicine
[{'content': 'A new test to measure B.P has successive reading of same person as follow: 110/70 mmHg, 128/80 mmHg, 132/70 mmHg, 160/90 mmHg. The given test has, when mean B.P =120/80mmHg. \nSelect and explain. \nA. Low validity, Low reliability, B. Low validity, high reliability, C. High validity, low reliability, D. High validity, high reliability', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]