Which of the following is formed when $SO_3$ is absorbed by concentrated $H_2SO_4$?

Assertion : Ozone is an allotrope of oxygen.
Reason : Oxygen is a bluish-coloured liquid and in its singlet state,it is paramagnetic.

The correct sequence of decreasing number of $\pi$-bonds in the structures of $H_2SO_3$,$H_2SO_4$,and $H_2S_2O_7$ is:

The incorrect statement among the following is:

Which one of the following properties is not correct for ozone?

Below are two statements. One is labeled as Assertion $(A)$ and the other as Reason $(R):$
Assertion $(A):$ $H_2Te$ is more acidic than $H_2S$.
Reason $(R):$ The bond dissociation enthalpy of $H_2Te$ is less than that of $H_2S$.
In the context of the above statements,choose the correct answer from the following options: