The alkene formed as a major product in the below elimination reaction is

In the given reaction,electrophilic substitution takes place at which position?

In the reaction given below,the total number of atoms having $sp^2$ hybridization in the major product $P$ is. . . . .

Which of the following is the correct order of reactivity for:

What is the fission of covalent bonds?

In the above reaction,the electrophile is substituted at the meta position only,due to:
$I$. Electron density is more at ortho $\&$ para positions
$II$. Electron density is relatively less at ortho $\&$ para positions
$III$. Electron density is less at meta position
$IV$. Electron density is relatively more at meta position
The correct answer is: