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
A lady presented with a 4 cm tumor in the left parietal lobe for which she underwent surgery and radiotherapy. After 3 months she presented with headache and vomiting. Which of the following would characterise the lesion in the patient? 
Select and explain. 
A. Gd-enhanced MRI, B. 99Tc-HMPAO SPECT brain, C. c)	Digital substraction angiography with dual source of ST scan, D. d)	18FDG PET Scan
D: d)	18FDG PET Scan
Answer: D: d)	18FDG PET Scan 
Explanation: None