This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiration, Subject name: Pathology
A 40 year old female was admitted to hospital with fever, loss of appetite and weight, cough and weakness of 3 months duration. A chest X-ray showed consolidation at the upper part of lung. She died a few days after admission. Autopsy findings of gross lung and its biopsy findings have been shown. What is your diagnosis? 
Select and explain. 
A. Sarcoidosis, B. Ca lung, C. Tuberculosis Lung, D. Bronchiectasis
C: Tuberculosis Lung
Answer: C: Tuberculosis Lung 
Explanation: Ans. (c) Tuberculosis lungGross lung shows upper lobe cavitations and its biopsy findings shows caseating granuloma suggestive of Tuberculosis.