Which of the following foods is a good source of vitamin K recommended by the practical nurse (PN)?

Spinach is considered a good source of vitamin K due to its high levels of this essential nutrient. Vitamin K plays a vital role in blood coagulation and bone metabolism. Leafy green vegetables like spinach are particularly rich in vitamin K1, which is the primary form found in plant foods. This nutrient is crucial for the body's ability to form blood clots and maintain bone health.

Carrots, apples, and rice do not provide significant amounts of vitamin K when compared to spinach. While they are nutritious foods in their own right, they are not recommended as primary sources of this vitamin. Therefore, spinach stands out as the best choice for someone looking to increase their intake of vitamin K.