Ans: A. Confirmed extra-pulmonary tuberculosis patient with cough of 2 weeks or more(Ref: Park 24/e p188-189, 23/e p178: 22/e p 168; htip://tbcindia.nic.in)A contact of confirmed extra-pulmonary tuberculosis patient - TB suspect.If persistent cough of any duration (2 weeks is not required).TB suspects:Pulmonary TB Suspect:Defined as:Any individual having cough of >2 weeks.Contacts of smear positive TB patients having cough of any duration.Suspected/confirmed extra-pulmonary TB patient having cough of any duration.HIV-positive patient having cough of any duration.MDR-TB Suspect:Any TB patient who fails an RNTCP Category failing I or III treatment regimen.Any RNTCP Category II patient with sputum smear positive at end of 4th month of treatment or later.Close contacts of MDR-TB patients with smear positive pulmonary TB.