Here's why:

* Nucleic acids are complex molecules made up of nucleotides. Nucleotides consist of a sugar, a phosphate group, and a nitrogenous base.

* RNA (ribonucleic acid) is a type of nucleic acid that plays a crucial role in protein synthesis. It carries genetic information from DNA to the ribosomes, where proteins are made.

The other options are incorrect:

* Carbohydrates are sugars and starches.

* Proteins are made up of amino acids.

* Lipids are fats and oils.