GKFix MCQ Question

What is the structural formula for 2-Ethylbutane (as named, though structurally incorrect)?

• 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