What skin condition is characterized by yellowish dark patches?

The skin condition characterized by yellowish dark patches can indeed encompass various conditions, which is why the comprehensive choice indicating "All of the above" is the correct one.

Hyper-pigmentation refers to areas of the skin that become darker than the surrounding skin, which can present in a variety of hues, including yellowish tones depending on factors such as the individual's skin type and underlying causes. Chloasma, commonly seen in pregnant women, involves the development of dark, pigmented patches, typically on the face, and can also take on a yellowish appearance. Melasma, often associated with hormonal changes or sun exposure, leads to dark, irregular patches on the skin and can exhibit shades of yellowish-brown.

Together, these conditions highlight the different manifestations of pigmentation issues, and they can all present as yellowish dark patches under certain circumstances. This collective representation of conditions confirms that the option encompassing all of these is accurate.