What is the correct IUPAC name for 3-ethyl-3-isopropylbutane?

Update: a. 2-ethyl-2-isopropylbutane
b. 3-ethyl-2,3-dimethylpentane
c. 2-ethyl-1,2,3-trimethylbutane
d. 2-ethyl-3-methylhexane
1 answer 1