In the following compounds, the decreasing order of basic strength will be:

• A. C2H5 NH2> NH3> (C2H5)2 NH
• B. (C2H5)2 NH > NH3> C2H5NH2
• C. (C2H5)2 NH > C2H5NH2> NH3
• D. NH3> C2 H5NH2> (C2H5)2 NH