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B
4-iso-propyl-m-xylene
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C
4-iso-propyl-2,3-dimethylbenzene
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D
4-iso-propyl-3,5-dimethylbenzene
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Solution
The correct option is A 1-iso-propyl-2,4-dimethylbenzene According to IUPAC convention, least number should be given to the substituent on parent molecule.