This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
What is the ratio of Kappa and lambda free light chains normally 
Select and explain. 
A. 7:03, B. 6:04, C. 4:06, D. 3:07
C: 4:06
Answer: C: 4:06 
Explanation: In a healthy individual, the total kappa tolambda ratio is roughly 2:1 in serum (measuring intact whole antibodies) or 1:1.5 if measuring free light chains, with a highly divergent ratio indicative of neoplasm. Ref Robbins 9/e p102