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: Biochemistry
[{'content': 'All of the following are characteristics of rickets except? \nSelect and explain. \nA. Bow-legs, B. Delay in teeth formation, C. Decreased plasma level of calcitriol, D. Decreased alkaline phosphatase activity', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Rickets in children is characterized by bone deformities due to\xa0incomplete mineralization, resulting in soft and pliable bones and delay in teeth formation. The weight bearing bones are bent\xa0to\xa0form\xa0bow-legs.\nIn\xa0rickets, the\xa0plasma level\xa0of\xa0calcitriol\xa0is\xa0decreased\xa0and\xa0alkaline phosphatase\xa0activity\xa0is\xa0elevated.\xa0Alkaline phosphatase is concerned with\xa0the\xa0process of bone formation.\n\nReference: Satyanarayana- Biochemistry, 3rd edition, pg-127', 'role': 'assistant'}]