Which of the following is an isomer of 2,2-dimethylpentan-1-ol?

Which of the following is an isomer of 2,2-dimethylpentan-1-ol? 



A CH3CH2CH2CH(CH3)CH2OH
B (CH3)3CCH(CH3)CH2OH
C CH3CH2CH2CH2CH2CH2CH2CH2OH
D (CH3)2CHC(CH3)2CH2CH2OH


Answer: B (CH3)3CCH(CH3)CH2OH


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