GKFix MCQ Question

Decreasing order of basic strength in the gas phase for C2H5NH2, (C2H5)2NH, (C2H5)3N, and NH3 is?

• A. (C2H5)3N > (C2H5)2NH > C2H5NH2 > NH3
• B. (C2H5)2NH > (C2H5)3N > C2H5NH2 > NH3
• C. C2H5NH2 > (C2H5)2NH > (C2H5)3N > NH3
• D. NH3 > C2H5NH2 > (C2H5)2NH > (C2H5)3N