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': 'Vitamin A deficiency causes all of the following EXCEPT:- \nSelect and explain. \nA. Growth retardation due to  impairment in skeletal formation, B. Degeneration of germinal epithelium leading to sterility in males, C. Nyctalopia, D. Loss of weight, irritability, loss of hair and joint pains', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Night blindness (nyctalopia) is one of the earliest symptoms of vitamin A deﬁciency.\nVitamin A deﬁciency results in growth retardation due to impairment in skeletal formation.\nThe reproductive system is adversely aﬀected in vitamin A deﬁciency. Degeneration of germinal\xa0 epithelium leads to sterility in males.\xa0\nExcessive consumption of vitamin A leads to toxicity.\xa0\nThe\xa0 symptoms of hypervitaminosis A include dermatitis (drying and redness of skin), enlargement of liver, skeletal decalciﬁcation, tenderness of long bones, loss of weight, irritability, loss of hair, joint\xa0 pains etc.\n\nKey Concept:\nVitamin A deﬁciency causes growth retardation due to impairment in skeletal formation,degeneration of germinal epithelium leading to sterility in male and nyctalopia\nReference: Satyanarayana- Biochemistry, 3rd edition, pg-123', 'role': 'assistant'}]