Applying IUPAC rules, what is the name of \({\text{C}}{{\text{H}}_{\text{3}}}{\text{CH(C}}{{\text{H}}_{\text{3}}}{\text{)C}}{{\text{H}}_{\text{2}}}{\text{COOH}}\)?

A.     2,3-dimethylpropanoic acid

B.     Pentanoic acid

C.     3-methylbutanoic acid

D.     2-methylbutanoic acid

C

There were no comments about this question but it is worth noting that over 56% chose answer D.