Correct answer: b
The condition described in question is freckles/ ephelides.
Freckles, or ephelides, are small, brown macules that occur on sun-exposed skin, especially in people with fair skin.
Freckles usually appear at about age 5 years. The pigmentation of a freckle deepens with exposure to sunlight and fades when light exposure ceases.
Freckles show hyperpigmentation of the basal keratinocytes without a concomitant increase in the number of melanocytes.
The other choices represent raised lesions of the skin.