Final answer:
Turnip greens are an excellent calcium-rich alternative for a lactose-intolerant pregnant client, whereas green beans, cantaloupe, and nectarines are not high in calcium.
Step-by-step explanation:
A pregnant client who is lactose intolerant should look for alternative sources of calcium to maintain her dietary needs. Green leafy vegetables, such as turnip greens, are high in calcium and are a suitable alternative for those who cannot consume dairy products.
Other non-dairy foods rich in calcium include broccoli, intact salmon, canned sardines with bones, nuts, beans, and seeds. Additionally, while green beans, cantaloupe, and nectarines may provide some nutritional benefits, they are not considered high in calcium. Therefore, of the options provided, turnip greens would be the best choice for a calcium-rich food for someone who is lactose intolerant.