MCQ
Which one of the following is the most basic compound :
- A$C_6H_5-NH_2$
- B$C_6H_5-NHCH_3$
- C$C_6H_5-N(CH_3)_2$
- ✓$C_6H_5N(C_2H_5)_2$
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($R $ = alkyl group; $en$ = ethylenediamine)