Which is the most suitable reagent among the following distinguish compound (3) from the others ?
Ch₃C = C - CH₃
CH₃CH₂ - CH₂ - CH₃
CH₃CH₂C = CH
CH₃CH = CH₂
a. bromine in carbon tetrachloride
b. bromine in acetic acid solution
c. Alk.KMnO₄
d. ammonical silver nitrate