Correct answer is: (4) Cl2, Br2, I2 only
\(X_2(aq)+\underset{(Cold\ and \ diluted)}{OH^Θ}\rightarrow \overset{-1}X{^Θ} (aq)+\overset{+1}XO^Θ (aq)\)
\(X_2+\underset{(Hot\ and \ Conc)}{OH^Θ}\rightarrow \overset{-1}X{^Θ} (aq)+\overset{+5}XO_3^{Θ} (aq)\)
[X = Cl, Br or I]