Task: SWRL-based Rule Reasoning (ontology: Earth_Environment/EnvironmentOntology)

Suppose an individual ?x satisfies: ketone(?x). Which conclusion is one valid inferred conclusion?

A. carbonyl compound(?x)
B. carbon oxoacid(?x)
C. ether(?x)
D. dicarboxylic acids and O-substituted derivatives(?x)

Answer: carbonyl compound(?x)