This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Surgery
[{'content': 'Which of the following is the least sensitive in preoperative imaging of parathyroid in Primary hyperparathyroidism? \nSelect and explain. \nA. Sestamibi, B. Sestamibi SPECT, C. MRI, D. USG', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) MRIRef. SABISTON 20th Edition Page 930ImagingSensitivitySpecificitySafetyTc99 SestamibiModerateModerateSafeSestamibiSPECTHighHighSafeUltrasoundModerateModerateSafe4D CTHighHighRadiationMRILowModerateSafePET/CTHighHighRadiationVenous localizationHighHighNephropathy site specific injuryUSG guided biopsyHighHighSite specific injury', 'role': 'assistant'}]