Which of the following is NOT a question asked to determine skin type?

To determine skin type, it is essential to gather information that directly relates to the skin's characteristics and its reaction to UV exposure. Natural hair color, the number of freckles, and natural eye color are all important elements that help assess an individual's pigmentation and sensitivity to sunlight, which are critical factors in determining skin type.

The correct answer relates to a question that does not provide relevant information for understanding how a person's skin will react to UV light. Inquiring about a person's favorite tanning product does not inform us about their skin’s baseline characteristics or how it might respond to tanning or sun exposure. This type of question focuses more on personal preferences rather than biological traits, which are essential for accurately assessing skin type and ensuring safe tanning practices.