There is bonding between two atoms where one atom is having one vacant orbital and another is having one lone pair of electrons. The bond is known as $\mathrm{p}\left(\mathrm{pi}\right)-\mathrm{p}\left(\mathrm{pi}\right) \mathrm{or} \mathrm{p}\left(\mathrm{pi}\right)-\mathrm{d}\left(\mathrm{pi}\right)$.

The total number of $\mathrm{\sigma }$ and $\mathrm{\pi }-$bonds present in the following compound are

Given below are two statements.

Statement I: The presence of weaker $\mathrm{\pi }$-bonds make alkenes less stable than alkanes

Statement II: The strength of the double bond is greater than that of carbon-carbon single bond.

In the light of the above statements, choose the correct answer from the options : given below.

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Which one doesn't have $\mathrm{\pi }-$bond?