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: Pathology
Gene for major histocompatibility complex is located on which chromosome? 
Select and explain. 
A. Chromosome 10, B. Chromosome 6, C. X chromosome, D. Chromosome 13
B: Chromosome 6
Answer: B: Chromosome 6 
Explanation: Major histocompatibility complex also called the human leucocyte antigen (HLA) is a 4 megabase region on chromosome 6. The region is densely packed with genes.
The gene encodes two major proteins or antigens i.e., MHC I and MHC