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: Anatomy
Manubriosternal joint is ? 
Select and explain. 
A. Primary cailaginous, B. Secondary caritilaginous, C. Synol, D. Ellipsoid
B: Secondary caritilaginous
Answer: B: Secondary caritilaginous 
Explanation: Ans. is 'b' i.e., Secondary cailaginous