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: Radiology
Stereotactic radiotherapy is used in 
Select and explain. 
A. Miliary tuberculosis, B. Stage I lung carcinoma, C. Lymphangitis Carcinomatosa, D. Carcinoma base of tongue with positive lymph nodes
B: Stage I lung carcinoma
Answer: B: Stage I lung carcinoma 
Explanation: Ans. b. Stage I lung carcinoma