Among the given compounds,the correct order of enol content is:
$(I)$ Cyclopentanone
$(II)$ $4$-hydroxycyclopent-$2$-en-$1$-one derivative
$(III)$ $\gamma$-butyrolactone derivative

Consider the above reaction,the major product $P$ formed is:

Which of the following represent free radical substitution reaction $(FSR)$,electrophilic addition reaction $(EAR)$ and nucleophilic addition reaction $(NAR)$?
$I. CH_3-CH=CH_2 \xrightarrow{Cl_2/CCl_4} CH_3-CHCl-CH_2Cl$
$II. CH_3-CO-CH_3 \xrightarrow{HCN/OH^-} CH_3-C(OH)(CN)-CH_3$
$III. CH_3-CH_2-CH_3 \xrightarrow{Cl_2/h\nu} CH_3-CHCl-CH_3$

The major product of the above reaction is:

The major product for the following reaction is:

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