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: Microbiology
Which precipitates at 50°C-60°C but disappears on heating - 
Select and explain. 
A. Heavy chain, B. Light chain, C. Both, D. None of the above
B: Light chain
Answer: B: Light chain 
Explanation: None