<prompt> Ghons focus is seen in?AmoebiasisLepromatous LeprosyPrimary TuberculosisSyphilis  <response>: Ans. is c i.e., Primary tuberculosis Ghons focus is one of the component of Ghons complex primary complex, which is the characteristic lesion of primary pulmonary tuberculosis. Inhaled tubercule bacilli implanted in the distal air spaces of the lower part of upper lobe or upper part of the lower lobe, close to the pleura. This area is about 1 to 1.5 cm with caseating necrosis known as Ghons focus. Primary complex or Ghons complex of tuberculosis consists of 3 components.i Ghons focus.ii Draining lymphaticsiii Caseating hilar lymphnode 