Final answer:
The best source of zinc among the given options for a vegetarian is pinto beans, which are high in zinc and beneficial for vegetarians. Other sources include brewer's yeast, almonds, legumes, and green vegetables like broccoli and asparagus.
Step-by-step explanation:
A nurse is providing teaching to a client who is vegetarian and requires an increase in zinc intake. Among the options provided, d. Pinto beans should be included in the teaching as the best source of zinc. Pinto beans are part of the legume family, which is known to be a good source of zinc, especially for vegetarians. In contrast, pineapple, green grapes, and cauliflower contain lower amounts of zinc in comparison to legumes like pinto beans. For a vegetarian, it's essential to include foods like legumes, seeds, nuts, and whole grains to ensure adequate zinc intake.
Other vegetarian sources of zinc include brewer's yeast, almonds, legumes, enriched breads and cereals, broccoli, and asparagus. It's vital for vegetarians to consume a variety of these foods to meet their nutritional needs, since there is no single perfect food that provides all the required nutrients.