Which is the most suitable reagent among the following to distinguish compound (3) from rest of the compound(s)? $$\begin{array}{1 1}(1)\;CH_3C\equiv C-CH_3&(2)\;CH_3-CH_2-CH_2-CH_3\\(3)\;CH_3-CH_2-C\equiv CH&(4)\;CH_3-CH=CH_2\end{array}$$

Question

$\begin{array}{1 1}(a)\;\text{Bromine in carbon tetrachloride}\\(b)\; \text{Bromine in acetic acid}\\(c)\;\text{Alk}.KMnO_4\\(d)\;\text{Ammoniacal silver nitrate}\end{array}$