Which of the following effects of the methoxy group operate on negative charge of the below carbanion?

What is the correct order of the above rate of reactions?

The reaction in which free radicals can be formed by homolytic fission is

$\left(\mathrm{a}\right)$  

$\left(\mathrm{b}\right)$  

$\left(\mathrm{c}\right)$  

Which of the following is the correct ranking from the least stable to the most stable?

$\mathrm{I}.$  

$\mathrm{II}.$   

$\mathrm{III}.$   

$\mathrm{IV}.$