Teacher:Given a scientific passage and an answer, generate a question for the given answer.
Teacher: Now, understand the problem? Solve this instance: Passage: Benzene is the smallest aromatic hydrocarbon. It has just one ring. You can see its structural formula in Figure below . Benzene has many uses. For example, it is used in air fresheners and mothballs because of its strong scent. Answer: benzene
Student:
What is the smallest aromatic hydrocarbon?