which two electromagnetic waves are useful for diagnosing illnesses?\no x - rays and radio waves\no…

Brief Explanations:

X - rays can penetrate the body and create images of bones and some internal structures to detect fractures, tumors etc. Gamma rays are used in nuclear medicine for imaging techniques like PET scans to diagnose diseases by detecting the radiation emitted from a radioactive tracer in the body. Radio waves are mainly used in MRI but not as common as X - rays and gamma rays for general disease diagnosis. Microwaves, visible light and ultraviolet waves are not typically used for diagnosing illnesses in the same way.

Answer:

No correct option is fully accurate, but if we consider common ones, X - rays and gamma rays are more relevant for diagnosis among the given options. However, if we must choose from the provided choices, none of them are completely correct as radio waves are not as commonly used for diagnosis as X - rays and gamma rays are. If forced to pick, the closest might be the option with X - rays and gamma rays (but it's not present in the given choices).