How many chiral centers are in the following compound?

The tautomer of $II$ is

Which of the following compounds does not exhibit keto-enol tautomerism?

The number of stereoisomers possible for the following compound is $CH_3-CH=CH-CH(Br)-CH_2-CH_3$

Which of the following statements is not correct about the compound $(I)$ shown below?
$(I)$ = $3-$bromocyclopropene

The correct statement$(s)$ concerning the structures $E, F$ and $G$ is (are):
$E$: $CH_3CH_2CH(CH_3)COCH_3$
$F$: $CH_3CH_2C(OH)=C(CH_3)_2$ (enol form)
$G$: $CH_3CH_2C(CH_3)=C(OH)CH_3$ (enol form)
$(A)$ $E, F$ and $G$ are resonance structures
$(B)$ $E, F$ and $E, G$ are tautomers
$(C)$ $F$ and $G$ are geometrical isomers
$(D)$ $F$ and $G$ are diastereomers