This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Which of the following is not a component of TPN \nSelect and explain. \nA. Aminoacids, B. Fats, C. Fibre, D. Vitamins', 'role': 'user'}, {'content': 'Answer: C \nExplanation: TPN can be administered either by a catheter inseed in the central vein or a peripheral line. In the early days of paren- teral nutrition, the only energy source available was hypeonic glucose, which, being hypeonic, had to be given into a cen- tral vein to avoid thrombophlebitis. In the second half of the last century, there were a number of impoant developments that have influenced the administration of parenteral nutri- tion. These include the identification of safe and non-toxic fat emulsions that are isotonic; pharmaceutical developments that permit carbohydrates, fats and amino acids to be mixed in single containers; and a recognition that the provision ofenergy during parenteral nutrition should be a mixture of glu- cose and fat and that energy requirements are rarely in excess of 2000 kcal/day (25-30 kcal/kg per day). These changes enabled the development of peripheral parenteral nutrition. Ref: Bailey and love 27th edition Pg no :286', 'role': 'assistant'}]