Maryland Cosmetology State Practice Exam

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What are furrows in nails caused by?

Vitamin deficiencies
Nutrition, injury or illness
Frequent exposure to water
Careless filing

The correct answer is: Nutrition, injury or illness

Furrows in nails, also known as ridges, can be caused by a variety of factors including nutrition, injury and illness. While vitamin deficiencies may contribute to brittle or discolored nails, it is not the main cause of furrows. Frequent exposure to water can also lead to damaged nails, but it is not the sole cause. Careless filing can also create ridges on the nails, but it is less likely to be the main cause compared to nutrition, injury, or illness.