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: Radiology
[{'content': 'Most impoant mechanism of action of microwave irradiation is? \nSelect and explain. \nA. Thermal effect, B. Ionizing effect, C. Stereotactic effect, D. All of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is'a'i.e., Thermal effect .Ref: cdn.intechopen.com/.../InTech- Prospective -apPlication -of-microwaves-in-medicineThe most impoant mechanism in medical applications of microwaves is the thermal effects of EM field.", 'role': 'assistant'}]