This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Most common type of shock in emergency room is \nSelect and explain. \nA. Cardiogenic, B. Hypovolaemic shock, C. Obstructive, D. Neurogenic', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hypovolaemic shock is the most common form of shock', 'role': 'assistant'}]