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
[{'content': 'A ring chromosome is a special form of \nSelect and explain. \nA. Inversion, B. Isochromosome, C. Deletion, D. Translocation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: A ring chromosome is a special form of deletion. It is produced when a break occurs at both ends of a chromosome with the fusion of the damaged ends. If significant genetic material is lost, phenotypic abnormalities result. This might be expressed as 46, XY,r(14). Ring chromosomes do not behave normally in meiosis or mitosis and usually result in serious consequences.Ref: Robbins and Cotran Pathologic Basis of Disease; 9th edition; Chapter 5; Genetic Disorders; Page no: 160', 'role': 'assistant'}]