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: Surgery
After 4 weeks of Head trauma, pt. presents with features of irritability and altered sensorium. Commonest cause will be - 
Select and explain. 
A. Chronic subdural hematoma, B. Extradural hematoma, C. Intraparenchymal bleed, D. Electrolyte imbalance
A: Chronic subdural hematoma
Answer: A: Chronic subdural hematoma 
Explanation: None