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A compound gives a positive test with I2/NaOH and is extracted from benzene by saturated NaHSO3, It may be :

(a) ${\mathrm{CH}}_{3}{\left({\mathrm{CH}}_{2}\right)}_{4}\mathrm{CHO}$

(b) ${\mathrm{CH}}_{3}{\left({\mathrm{CH}}_{2}\right)}_{3}{\mathrm{COCH}}_{3}$

(c) ${\mathrm{CH}}_{3}{\mathrm{CH}}_{2}{\mathrm{COCH}}_{2}{\mathrm{CH}}_{3}$

(d) ${\mathrm{CH}}_{3}{\left({\mathrm{CH}}_{2}\right)}_{4}{\mathrm{CH}}_{2}\mathrm{OH}$