Final answer:
The pigment that can make the skin appear orange or yellow when found in high concentrations in the body is a) β-carotene, which is also responsible for the orange color in carrots.
Step-by-step explanation:
The pigment found in vegetables that can make the skin appear orange or yellow is a) β-carotene (also referred to as beta-carotene or carotene).
This pigment is present in the epidermis and gives skin a yellowish tint, especially in the skin with low levels of another pigment called melanin.
β-carotene is responsible for the orange color in vegetables like carrots, and is also found in the thylakoid membrane of plants where it assists in photosynthesis.
It is different from other pigments such as hemoglobin, which gives a pinkish tint to the skin, or bilirubin, which can cause a yellowish tinge in the case of jaundice.