Ultraviolet rays are effective in treating acne, seborrhea, and dandruff conditions, but they do not treat sluggish metabolism. Therefore, the exception among the options given is a sluggish metabolism. Thus, the correct answer is B. ;
Ultraviolet rays are effective for treating acne, seborrhea, and dandruff, but they are not used to treat sluggish metabolism. The correct answer is B, a sluggish metabolism, as it is not a skin condition. UV rays have limited application and do not address overall metabolic health.
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