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: Surgery
Oncotype Dx test is done to for the following in breast cancer: 
Select and explain. 
A. Chemotherapy in hormone receptor positive patients, B. Hormone therapy in hormone positive, C. Chemotherapy in hormone receptor negative patients, D. Herceptin in Her-2-neu +ve.
A: Chemotherapy in hormone receptor positive patients
Answer: A: Chemotherapy in hormone receptor positive patients 
Explanation: Ans: A. Chemotherapy in hormone receptor positive patients(Ref Harrison I9/e p528; DX:Multigene tests.Uses:To guide chemotherapy decisions for,Node-negative cases.Hormone receptor-positive cases.HER2-negative breast cancer.Used clinically for early-stage breast cancer predicting recurrence risk & guide adjuvant chemotherapy decisions.