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': 'Which of the following is not a grass-root level worker: September 2011 \nSelect and explain. \nA. Health assistant, B. Traditional bih assistant, C. Anganwadi worker, D. Village health guide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A: Health assistant Village health guides, Trained bih attendants and Anganwadi worker works at village level Health assistant is at the level of primary health center', 'role': 'assistant'}]