Which is the most suitable reagent among the following to distinguish compound (3) from rest of ...

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Which is the most suitable reagent among the following to distinguish compound (3) from rest of the compounds ?
1. \( \mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_{3} \)
2. \( \mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{3} \)
3. \( \mathrm{CH}_{3}-\mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CH} \)
4. \( \mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}_{2} \).
(a) Bromine in carbon tetrachloride
(b) Bromine in acetic acid
(c) \( \mathrm{Alk} \mathrm{KMnO}_{4} \)
(d) Ammonical silver nitrate.
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