Which of the following is an organic molecule?

The molecules that have one or more carbon atoms in their structure are called organic molecules. ... It has six carbon atoms in its structure which makes it an organic molecule. Water (H2O), hydrogen gas (H2) and nitrous oxide (N2O) do not have carbon in their structure.

Explanation:

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a