This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'The colour coding of of 20G IV cannula is \nSelect and explain. \nA. Green, B. Grey, C. Pink, D. Blue', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]