According to national health policy, a subcentre caters to population in hilly and tribal areas –: (A) 3000, (B) 5000, (C) 1000, (D) 2500
Answer is A. 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.