The IUPAC name for the following compound is :
Option: 1 2,5-dimethyl-5-carboxy-hex-3-enal
Option: 2 2,5-dimethyl-6-carboxy-hex-3-enal
Option: 3 2,5-dimethyl-6-oxo-hex-3-enoic acid
Option: 4 6-formyl-2-methyl-hex-3-enoic acid
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