Propionic acid with $\mathrm{Br}_2 / \mathrm{P}$ yields a dibromo product, Its structure would be -

1. 
   
2. $\mathrm{CH}_2 \mathrm{Br}-\mathrm{CHBr}-\mathrm{COOH}$
3. 
   
4. $\mathrm{CH}_2 \mathrm{Br}-\mathrm{CH}_2-\mathrm{COBr}$

Asked in: NEET 2009 (Mains)

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