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: Medicine
[{'content': 'True about polymorphism is: \nSelect and explain. \nA. Single locus --> multiple normal alleles, B. Single locus --> multiple abnormal alleles, C. Single phenotype:Single locus -+ multiple normal alleles, D. Single phenotype: Single locus --> multiple abnormal alleles', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e., Single phenotype, single locus, multiple normal allelle', 'role': 'assistant'}]