This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
[{'content': 'A pt is brought to the emergency as a case of head injury, following a head on collision road traffic accident. His BP is 90/60 mmHg. Tachycardia is present. Most likely diagnosis is \nSelect and explain. \nA. EDH, B. SDH, C. Intra abdominal bleeding, D. Intra cranial hemorrhage', 'role': 'user'}, {'content': 'Answer: C \nExplanation: CDST says "Patients with blunt trauma and hypovolemia should be examined first for Intra abdominal bleeding even if there is no ove existence of abdominal trauma Ref: CDST 13th edition Pgno :196', 'role': 'assistant'}]