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Class I MHC has three genes, HLA-A, HLA-B and HLA-C. Which of the following is the correct order of level of polymorphism?

Class I MHC has three genes, HLA-A, HLA-B and HLA-C. Which of the following is the correct order of level of polymorphism? Correct Answer B > A > C

Among the three alleles of class I MHCs, HLA-B is more polymorphic than HLA-A and HLA-A is more polymorphic than HLA-C which means HLA-B has many different alleles compared to others.

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