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Question

Name the parent chain :
455601.png

A
Cyclobutane
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B
Cyclopropane
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C
Butane
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D
Cyclopropyl
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Solution

The correct option is A Cyclobutane
Parent chain = cyclobutane (four-carbon ring)
Numbers start from the carbon with the butyl substituent and go counter-clockwise. Starting from the butyl(counter-clockwise) or chloro(clockwise) would give the same numbering (1,2,3). So, butyl is chosen over chloro as carbon 1 because it is first alphabetically.
Substituents=1butyl2bromo3chloro

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