Which of the following acids is isomeric with phthalic acid

1.	Which of the following acids is isomeric with phthalic acid
A.	Succinic acid
B.	Salicylic acid
C.	1, 4-benzene dicarboxylic acid
D.	Methyl benzoic
Answer» D. Methyl benzoic

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Which of the following acids is isomeric with phthalic acid

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