Ghons focus lies at ?

Ans. is 'c' i.e., Right apical parenchymal regionPrimary T.B. includes :?An area of grey white (size of approx. 1-1.50 cm) inflammatory consolidation - called ghon's focus. o Lymph node.Lymphatics and lymphatic channel.Cavity and fibrosis is seen in secondary T.B.Inhaled tubercule bacilli implanted in the distal air spaces of the lower pa of upper lobe or upper pa of the lower lobe, close to the pleura. This area is about 1 to 1.5 cm with caseating necrosis known as Ghon's focus.Primary complex or Ghon's complex of tuberculosis consists of 3 components :Pulmonary compound or Ghon's focus.Draining lymphaticsCaseating hilar lymphnodeAssman's focusThe initial lesion in secondary tuberculosis at the apex of lung (infraclavicular) without any lymph node involvement is called Assman's focus.Ghon's complexThe initial lesion in primary tuberculosis at the periphery of the lung along with the enlarged peribronchial lymph node is called Ghon's complex.