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: Medicine
The most common lymph node group involved in Tb lymphadenitis is : 
Select and explain. 
A. Posterior cervical, B. Axillary, C. Intraabdominal, D. Jugulodigastric
A: Posterior cervical
Answer: A: Posterior cervical 
Explanation: Lymph node TB presents as painless swelling of the lymph nodes, Most commonly at posterior cervical and supraclavicular sites are involved. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 1346