This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Integrated QBank, Subject name: Unknown
[{'content': 'A 14-year-old intellectually disabled child presented to the OPD for the first time with hyper-extensible finger joints and macro-orchidism along with characteristic facial features. MRI of the brain was done. Which of the following sequence repeats is seen in the above condition: - \nSelect and explain. \nA. CGG, B. CGA, C. CAG, D. CGC', 'role': 'user'}, {'content': 'Answer: A \nExplanation: This is a case of Fragile- X syndrome. MRI image shows diffuse brain atrophy. X-linked dominant inheritance. The facial features, which include a long face, large ears, and a prominent square jaw. There are variable number of trinucleotide (CGG) repeats in FMR1 gene.', 'role': 'assistant'}]