GKFix MCQ Question

What is the structural formula for 2-Ethylbutane?

• A. CH3 – CH2 – CH(C2H5) – CH3
• B. CH3 – CH(C2H5) – CH2 – CH3
• C. CH3 – C(C2H5)2 – CH3
• D. CH3 – CH2 – CH2 – CH(C2H5) – CH3