A client has been newly diagnosed with breast cancer. The client has been prescribed ondansetron (Zofran), but the client is unsure of the indication for this medication. What is your response as a nurse?

This medication is used to treat prolonged QT intervals."

The medication is used for the treatment of extrapyramidal symptoms."

This medication prevents nausea related to chemotherapy

"This medication is used to treat diarrhea.