This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Osteology of Thorax, Subject name: Anatomy
[{'content': 'True about sternal angle - \nSelect and explain. \nA. Xiphisternal joint, B. AtT6.7 level, C. Articulates with 2nd costal cartilage, D. None of the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Articulates with 2nd costal cartilageo Sternal angle of Louis is man uhriosternal joint (not xiphisternal joint),o It is at the level of T4 -T5 intervertebral space,o 2nd costal cartilage articulates at sternal angle", 'role': 'assistant'}]