You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is According to national health policy, a subcentre caters to population in hilly and tribal areas – and explain in detail?
Sub-centre 

The sub-centre is the peripheral outpost of the existing healthy delivery system in rural areas.
They are being established : -


One sub-centre for every 5000 population in general.
One sub-centre for every 3000 population in hilly, tribal & backward area.