Which of the following can be a source of Vitamin D?

Vitamin D can be obtained from several sources, with eggs and fish liver oils being among the most significant. Eggs contain a small amount of Vitamin D, primarily in the yolk, while fish liver oils, particularly cod liver oil, are particularly rich in this vitamin. This is important because Vitamin D plays a crucial role in calcium absorption and bone health.

Other sources of Vitamin D include fortified foods, such as certain cereals and dairy products, as well as sunlight exposure, which helps the body synthesize Vitamin D naturally. While fortified cereals can also be a source of Vitamin D, the primary emphasis in this question is on natural food sources, making eggs and fish liver oils the more prominent choice. Leafy green vegetables and nuts and seeds, while nutritious, do not provide significant amounts of Vitamin D compared to the correct option.