If the objective of the investigator is to assess the incidence of tuberculosis infection in a community, the most appropriate methodology would be to –

Social & Preventive Medicine

If the objective of the investigator is to assess the incidence of tuberculosis infection in a community, the most appropriate methodology would be to –

A study is to be conducted with regards to the fat content…

'There has been a gradual increase in number of non-communicable disease cases…

All of the following are done to remove Confounding except