What is the term for the acquired, symmetrical darkening of sun-exposed areas on the face and neck, commonly linked to pregnancy and oral contraceptive use?

Explanation

Melasma is characterized by acquired, symmetric hyperpigmentation on the sun-exposed regions of the face and neck, often associated with hormonal changes during pregnancy or from oral contraceptive use. Other options like melanoma, cafe-au-lait spots, and freckles differ in appearance and etiology.