To stabilise the $+\mathrm{ve}$ charge, $\mathrm{G}$ should be

What is the order of stability of the given carbocations?

$\left(\mathrm{I}\right)$   

$\left(\mathrm{II}\right)$ 

$\left(\mathrm{III}\right)$  

$\left(\mathrm{IV}\right)$  

Most stable free radical is 

What is the correct order of stability of the following carbanion?

(I)    

(II)  

(III)    

(IV)  

What is the order of stability of the following carbocations?