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': 'The action of vitamin K in formation of clotting factor is through: \nSelect and explain. \nA. Post transcription, B. Post translation, C. Golgi complex, D. Endoplasmic reticulum', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]