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
Which one of the following is not included in the treatment of malignant melanoma? 
Select and explain. 
A. Radiation, B. Surgical excision, C. Chemotherapy, D. Immunotherapy
A: Radiation
Answer: A: Radiation 
Explanation: Ans. is 'a' i.e., Radiation Radiation is the best answer. Schwaz 9/e writes- "although initially thought to be ineffective in the treatment of melanoma, the use of radiation therapy, regional and systemic chemotherapy, and immunotherapy are all under investigation."