This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ultrasonography, CT, and MRI, Subject name: Radiology
How much area is covered by spiral CT in 30 seconds? 
Select and explain. 
A. Entire organ, B. Entire abdomen, C. Entire trunk, D. Whole body
D: Whole body
Answer: D: Whole body 
Explanation: Ans. (d) Whole bodyRef. Molecular anatomic imaging: PET-CT and Spect- Ct integrated Modality imaging by Gustav konrad von schulthessch 6