Some reactions of amines are given. Which one is not correct?

Question

CH₃CH₂NH₂ + HNO₂ $ \to $ CH₃CH₂OH + N₂

CH₃NH₂ + C₆H₅SO₂Cl $ \to $ CH₃NHSO₂C₆H₅

(CH₃)₂NH + NaNO₂ + HCl $ \to $ (CH₃)₂N $-$ N $=$ O

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