Which of the following pairs does not exhibit | vedclass

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(D) Isomerism is defined as the phenomenon where compounds have the same molecular formula but different structural arrangements or spatial orientatio

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$C_6H_5COC(CH_3)_2C_6H_5$ and $(CH_3)_2C(C_6H_5)COC_6H_5$

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(D) Isomerism is defined as the phenomenon where compounds have the same molecular formula but different structural arrangements or spatial orientations.Option $A$: Both are ethers with the molecular formula $C_5H_{12}O$. They are chain isomers.Option $B$: $CH_3CH_2COOH$ (propanoic acid) and $CH_3COOCH_3$ (methyl acetate) have the same molecular formula $C_3H_6O_2$. They are functional isomers.Option $C$: $CH_3CH_2NO_2$ (nitroethane) has the molecular formula $C_2H_5NO_2$. $NH_2CH_2COOH$ (glycine) has the molecular formula $C_2H_5NO_2$. They are functional isomers.Option $D$: Both structures represent the same molecule,$2,2-diphenyl-1-phenylpropan-1-one$ (or similar nomenclature depending on $IUPAC$ rules),written in different orientations. They are identical,not isomers.

Column-$I$	Column-$II$
$A$. 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

Which of the following pairs does not exhibit isomerism?

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