Indicate whether each of the following pairs | vedclass

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(C) For pair $I$: The first structure is a Newman projection and the second is a wedge-dash representation. By assigning $R/S$ configurations,we find

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enantiomers || diastereomers || identical

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(C) For pair $I$: The first structure is a Newman projection and the second is a wedge-dash representation. By assigning $R/S$ configurations,we find one is $R$ and the other is $S$. Thus,they are enantiomers.For pair $II$: By assigning $R/S$ configurations to the chiral centers,we find that the configurations are not mirror images of each other. Therefore,they are diastereomers.For pair $III$: Both structures represent the same meso compound. By rotating the Fischer projection or checking the symmetry,we find they are identical.Thus,the correct sequence is enantiomers,diastereomers,identical.

$A$. Acetaldehyde,vinyl alcohol	$1$. Enantiomers
$B$. Eclipsed and staggered ethane	$2$. Tautomers
$C$. $(+)2$-butanol,$(-)2$-butanol	$3$. Chain isomers
$D$. Methyl-$n$-propylamine and diethylamine	$4$. Conformational isomers
	$5$. Metamers

Indicate whether each of the following pairs are identical,enantiomers,or diastereomers?
$I$ || $II$ || $III$

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$A$. Acetaldehyde,vinyl alcohol $1$. Enantiomers
$B$. Eclipsed and staggered ethane $2$. Tautomers
$C$. $(+)2$-butanol,$(-)2$-butanol $3$. Chain isomers
$D$. Methyl-$n$-propylamine and diethylamine $4$. Conformational isomers
$5$. Metamers

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Indicate whether each of the following pairs are identical,enantiomers,or diastereomers?$I$ || $II$ || $III$