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
HLA is present on- 
Select and explain. 
A. Sho term of chromosomes 3, B. Sho arm of chromosomes 6, C. Long arm of chromosomes 3, D. Chromosome 15
B: Sho arm of chromosomes 6
Answer: B: Sho arm of chromosomes 6 
Explanation: Reference :Robbins basic pathology 9th edition pg no 102 :loci named HLA A,HLA B and HLA C.Each of these molecules it&;s a hetero dimer consisting of polymorphic 44kDa alpha chain noncovalently associated with an invariant 12 kDa beta2 microglobulin polypeptide (encoded by a separate gene on chromosome 15)