<prompt> Most impoant mechanism of action of microwave irradiation is?Thermal effectIonizing effectStereotactic effectAll of the above  <response>: Ans. isai.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. 