Which of the following pairs are not isomeric | vedclass

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(C) Isomers are compounds with the same molecular formula but different structural arrangements.$A$. Ethyl ethanoate $(CH_3COOCH_2CH_3)$ and methyl pr

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Ethoxy propane and propoxy ethane

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(C) Isomers are compounds with the same molecular formula but different structural arrangements.$A$. Ethyl ethanoate $(CH_3COOCH_2CH_3)$ and methyl propanoate $(CH_3CH_2COOCH_3)$ are functional isomers (esters) with the same molecular formula $C_4H_8O_2$.$B$. Butanone $(CH_3COCH_2CH_3)$ and butanal $(CH_3CH_2CH_2CHO)$ are functional isomers with the same molecular formula $C_4H_8O$.$C$. Ethoxy propane $(CH_3CH_2OCH_2CH_2CH_3)$ and propoxy ethane $(CH_3CH_2CH_2OCH_2CH_3)$ are the same compound,just named differently. They are not isomers.$D$. Methoxy methane $(CH_3OCH_3)$ and ethanol $(CH_3CH_2OH)$ are functional isomers with the same molecular formula $C_2H_6O$.

Column $I$ (Compounds)	Column $II$ (Relation)
$(i)$ $CH_3-CH_2-C(CH_3)_2-Cl$ and $(CH_3)_3C-Cl$	$(P)$ Homologues
$(ii)$ $C_6H_5-O-CH_2-CH_3$ and $C_6H_5-O(CH_3)-CH_3$ (ortho-methylanisole)	$(Q)$ Functional group isomers
$(iii)$ $C_6H_5-O-CH_3$ and $2-methylphenol$	$(R)$ Metamers
$(iv)$ $CH_3-CH(CH_3)-CH_2-OH$ and $(CH_3)_3C-OH$	$(S)$ Position isomers

Which of the following pairs are not isomeric compounds?

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