Which of the following IUPAC names corresponds to a conjugated diketone?

Step-by-step solution

To identify a conjugated diketone, we must find a structure where the bonds (such as C=O and C=C ) are separated by exactly one single bond. Hexane-2,5-dione: CH₃-C(=O)-CH₂-CH₂-C(=O)-CH₃ . The two carbonyl groups are separated by two sp^3 hybridized carbon atoms, so it is not conjugated. Hept-4-ene-2,6-dione: CH₃-C(=O)-CH₂-CH=CH-CH₂-C(=O)-CH₃ . The C=C double bond is separated from the carbonyl groups by sp^3 hybridized CH₂ groups, so it is not conjugated. Hex-3-ene-2,5-dione: CH₃-C(=O)-CH=CH-C(=O)-CH₃ . The C=C do