This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Infra clavicular lesion of tuberculosis is known as ? 
Select and explain. 
A. Assman's focus, B. Puhl's focus, C. Simmon's focus, D. Ghon's focus
A: Assman's focus
Answer: A: Assman's focus 
Explanation: Ans. is 'a' i.e., Assman's focus Assman's focus The initial lesion in secondary tuberculosis at the apex of lung (infraclavicular) without any lymph node involvement is called Assman's focus.