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An organic compound A upon reacting with NH 3 gives B. On heating, B gives C. C in presence of KOH reacts with Br 2 to give CH 3 CH 2 CH 2 . A is -

1. CH 3 – CH – COOH CH 3
2. CH 3 CH 2 COOH
3. CH 3 COOH
4. CH 3 CH 2 CH 2 COOH

Correct answer: CH 3 CH 2 COOH

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