This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Medicine
Bence jones proteins are: 
Select and explain. 
A. Heavy chain Ig G, B. Present in bone marrow, C. Seen in lymphoma, D. Light chain IgG
D: Light chain IgG
Answer: D: Light chain IgG 
Explanation: Ans: dRef: CMDT 2004, p. 1731 see index, Harrison, 16thed, p. 659