This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CT SCAN, Subject name: Radiology
Which of the following appears hyperdense on CT? 
Select and explain. 
A. Air, B. Water, C. Fat, D. Acute bleed
D: Acute bleed
Answer: D: Acute bleed 
Explanation: Acute Bleed is Hyperdense on CT as it have +70 HU Coical Bone +400 to +1000 Calcifications +200 to +250 Contrast agents +130 Hu Acute Bleed +60 to +70 Hu CSF/Water 0 Fat - 50 to -100 Hu AIR -1000 Hu Acute ICH in right frontal lobe.