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A compound 'X' on treatment with Br 2 /NaOH, provided C 3 H 9 N, which gives positive carbylamine test. Compound 'X' is :

1. CH 3 CH 2 CH 2 CONH 2
2. CH 3 CON(CH 3 ) 2
3. CH 3 CH 2 COCH 2 NH 2
4. CH 3 COCH 2 NHCH 3

Correct answer: CH 3 CH 2 CH 2 CONH 2

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