Which of the following is a rich source of vitamin K?

Green, leafy vegetables are indeed a rich source of vitamin K, primarily because they contain significant amounts of phylloquinone, which is a form of vitamin K that plays a crucial role in blood clotting and bone metabolism. Food items such as spinach, kale, collard greens, and broccoli are particularly high in this vitamin. Consuming these vegetables enhances vitamin K intake and supports overall health, making them an essential part of a balanced diet.

While cereal products, poultry, and liver can contain various vitamins and minerals, they do not provide comparable levels of vitamin K found in green, leafy vegetables. Cereal products may offer other nutrients but are typically not known for high vitamin K content. Poultry and liver contribute different vitamins, such as B vitamins and iron, but do not serve as primary sources of vitamin K.