Biology

The correct answer is: A.Phosphorus

In addition to carbon, hydrogen, and oxygen, nucleic acids (such as DNA and RNA) also contain phosphorus. Phosphorus is a key component of the phosphate group in the nucleotides that make up DNA and RNA. The phosphate group is crucial for forming the backbone of the nucleic acid structure.

Explanation of the other options:

B.Calcium: This element is not part of nucleic acids. It is more commonly found in bones, teeth, and in various cellular signaling processes.

C.Nitrogen: W...