carbohydrates may for larger carbon based macromolecules by combining with which elements A) sodium, potassium, nitrogen B) nitrogen, sulfur, phosphorus C) potassium, sodium, sulfer D) silicon, phosphorus, sodium

The answer is B.

These elements are among the most important elements in life. Most of these elements are also non-metals. Elements life sulfur and nitrogen combine with carbohydrates to form among acids rings like cysteine. Carbohydrates combine with phosphorus to form molecules such as the DNA backbone chain.