This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory Chain, Subject name: Biochemistry
[{'content': "Which of the following is an example of Trinucleotide repeat mutation - \nSelect and explain. \nA. Huntington's chorea, B. Fragile-X-syndrome, C. Friedreich ataxia, D. All of the above", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., All of the above Trinucleotide repeat mutationo In this type of mutation a codon (i.e. trinucleotide sequence) undergoes amplification and the same codon is repeated continuously so many times in the chain.o Diseases associated w ith trinucleotide repeat mutation are Huntington-s disease (CAG repeat). Spinocerebellar ataxia (CAG repeat), friedreich ataxia (GAA repeat), fragile-X-syndrome (GGG or GCC repeat), dystrophia myotonica (CTG/CUG repeat), X-linked spinobulbar muscular atrophy (CAG repeat) and dentorubral paltidolusian atrophy (CAG repeat).", 'role': 'assistant'}]