A patient with metastatic breast cancer is prescribed trastuzumab. This drug exerts its therapeutic effect by targeting which of the following receptors?

✓ Correct Answer: Option C

Trastuzumab is a monoclonal antibody that specifically targets the human epidermal growth factor receptor 2 (HER2/neu) protein. It inhibits the growth of cancer cells that overexpress HER2, a common oncogene in certain breast cancers.