<prompt> Which is the most economical and best screening method?Mass screeningHigh risk screeningMultiphasic screeningNone of the above  <response>: High risk screening: In High risk screening,besides effectiveness,economical use of resources is also seen as screening tests are selectively applied to individuals in high risk groups High risk selective screening gives maximum yield. E.g. HIV screening in commercial sex workers Therefore it is the most economical and best screening method. 