$Br_2$ gas turns starch iodide paper

Which of the following is used to prepare $Cl_2$ gas at room temperature from concentrated $HCl$?

Arrange the following in the order of property indicated for each set:
$(i)$ $F_{2}, Cl_{2}, Br_{2}, I_{2}$ - increasing bond dissociation enthalpy.
$(ii)$ $HF, HCl, HBr, HI$ - increasing acid strength.
$(iii)$ $NH_{3}, PH_{3}, AsH_{3}, SbH_{3}, BiH_{3}$ - increasing base strength.

The following order is $NOT$ correct for: $HClO < HClO_2 < HClO_3 < HClO_4$

Which of the following statements is correct for halogens?

Assertion $A$: $SF_6$ is highly stable.
Reason $R$: $SF_6$ is a gas.
The correct option among the following is: