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
1 month later injury presents with irritability altered sensorium 
Select and explain. 
A. Extradural hematoma, B. SDH, C. ICH, D. SAH
B: SDH
Answer: B: SDH 
Explanation: Chronic subdural Hematoma Chronic SDH: Collection of blood breakdown products that is atleast 2-3 weeks old Chronic SDH: SDH often occurs in patients without a clear history of head trauma, as they may arise from minor trauma Clinical features Alcoholics, the elderly, and patients on anticoagulants are at higher risk for developing chronic SDH Patients may present with head ache, seizures, confusion, contralateral hemiparesis or Coma Ref:Sabiston 20th edition Pgno :439-441