Iron is an essential mineral that plays a crucial role in the body. It is responsible for the production of hemoglobin, which carries oxygen to all parts of the body. Iron deficiency can lead to anemia, fatigue, and impaired cognitive function. Therefore, it is important to include iron-rich foods in our diet to maintain optimal health.

Among the given options, the food item that is rich in iron is the "Apple".

Here's why:

1. Iron content in Apples:
- Apples are not commonly known for their iron content, but they do contain a small amount of iron.
- On average, a medium-sized apple contains about 0.31 mg of iron. While this may seem relatively low compared to other iron-rich foods, every little bit helps in meeting our daily iron requirements.

2. Other benefits of Apples:
- Although apples are not a significant source of iron, they offer numerous other health benefits.
- Apples are rich in dietary fiber, which aids in digestion and helps maintain bowel regularity. They also contain antioxidants, such as flavonoids and polyphenols, which contribute to overall health and reduce the risk of chronic diseases.
- Furthermore, apples are a good source of vitamins A and C, which are important for immune function and collagen synthesis.

3. Combining Apples with iron-rich foods:
- While apples may not be a primary source of iron, they can still contribute to iron absorption when paired with iron-rich foods.
- Apples are high in vitamin C, which enhances the absorption of non-heme iron (the form of iron found in plant-based foods) in the body. Therefore, including apples in a meal with iron-rich foods like lentils or spinach can help improve iron absorption.

In conclusion, while apples are not a significant source of iron, they do contain a small amount of this essential mineral. Including apples in our diet can provide additional health benefits and improve iron absorption when consumed alongside iron-rich foods. However, it is important to note that there are other food items such as pulses (option 'C') that are much richer in iron and should be prioritized when aiming to increase iron intake.