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Which type of melanoma is considered the least common but most dangerous?

  1. Basal cell carcinoma

  2. Squamous cell carcinoma

  3. Malignant melanoma

  4. Actinic keratosis

The correct answer is: Malignant melanoma

Malignant melanoma is considered the least common but most dangerous type of melanoma. Basal cell carcinoma and squamous cell carcinoma are types of skin cancer, but they are not types of melanoma. Actinic keratosis is a precancerous growth that can develop into squamous cell carcinoma, but it is not a type of melanoma. Malignant melanoma is the most dangerous type of melanoma because it has a higher likelihood of spreading to other parts of the body compared to other types of skin cancer.