Final answer:
Excision is the standard treatment for melanoma, which involves surgical removal of the cancerous tissue. While 5-fluorouracil is a chemotherapy agent, it is not primarily used for melanoma.
Step-by-step explanation:
Among the options given for treating melanoma, excision is the standard treatment.
Melanoma is cancer characterized by the uncontrolled growth of melanocytes in the epidermis.
It is one of the most serious types of skin cancer, known for being highly metastatic.
When detected at an early stage, it is typically treated through surgical excision to remove the cancerous tissue.
Another common method for diagnosis and treatment is Mohs surgery, which involves layer-by-layer removal and examination of skin tissue.
While 5-fluorouracil (5-FU) is used to treat certain types of cancer, its primary use is not for melanoma, but rather for cancers like basal cell carcinoma. Therefore, b) excision would be the correct option for treating melanoma.