The correct order of decreasing basic strength of the given amines is:

1. A. benzenamine > ethanamine > N-methylaniline > N-ethylethanamine
2. B. N-methylaniline > benzenamine > ethanamine > N-ethylethanamine
3. C. N-ethylethanamine > ethanamine > benzenamine > N-methylaniline
4. D. N-ethylethanamine > ethanamine > N-methylaniline > benzenamine

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