Which one of the following is a rich source of iron?

The correct answer is spinach. Spinach is a leafy green vegetable that is a good source of iron. It is also a good source of vitamins A, C, and K, as well as fiber.

Carrots are a root vegetable that is a good source of beta-carotene, which is converted to vitamin A in the body. They are also a good source of vitamin K and fiber.

Peas are a legume that is a good source of protein, fiber, and vitamins A and C. They are also a good source of iron, but not as good as spinach.

Rice is a grain that is a good source of carbohydrates and fiber. It is not a good source of iron.