Choice A rationale:

Skin irritation, fatigue, and nausea are potential side effects of radiation therapy.

Skin irritation is common at the site where radiation is administered.

Fatigue is a general side effect of radiation therapy, and nausea can occur if radiation is delivered to the abdomen or gastrointestinal area.

Choice B rationale:

Neutropenia, thrombocytopenia, and anemia are more commonly associated with chemotherapy than radiation therapy.

These are hematological side effects caused by the suppression of blood cell production in the bone marrow.

Choice C rationale:

Fever, chills, and hypotension are not typical side effects of radiation therapy.

These symptoms may be associated with other medical conditions or infections but are not directly related to radiation therapy.

Choice D rationale:

Graft-versus-host disease (GVHD) and organ damage are potential complications of bone marrow or stem cell transplantation, not radiation therapy.

GVHD occurs when the transplanted cells attack the recipient's tissues, and organ damage can result from various factors in the transplant process.