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
[{'content': 'RB gene is located on \nSelect and explain. \nA. 13q14, B. 14g13, C. 13p14, D. 14p13', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' 13q14Retinoblastoma is a prime example of a tumour which is associated with loss of heterozygosity.The mutations required to produce retinoblastomas involve the RB genelocated on chromosome 13 q14.", 'role': 'assistant'}]