What is the product when acetylene reacts with hypochlorous acid ?

1. $\mathrm{CH}_3 \mathrm{COCl}$
2. $\mathrm{ClCH}_2 \mathrm{CHO}$
3. $\mathrm{Cl}_2 \mathrm{CHCHO}$
4. $\mathrm{ClCHCOOH}$

Asked in: JEE Main 2002

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