The correct `IUPAC` name is

Options

A. (1) `CH_(3)-underset(2-"Bromo-3-chlorobutane")(underset(O)underset(||)(C)-underset(CH_(3))underset(|)(CH)-CH_(3))`
B. (2) `CH_(3)-underset(2,3-"Dimethylpentane")(underset(CH_(3))underset(|)(CH)-underset(CH_(2)CH_(3))underset(|)(CH)CH_(3))`
C. `underset(4-"Methylpent-2pne")(CH_3C-=C CH(CH_3)_2`
D. (4) `CH_(3)-underset(2,3-"Bromo-3-chlorobutane")(underset(Cl)underset(|)(CH)-underset(Br)underset(|)(CH)-CH_(3))`

Answer

A

Explanation

The compound is a ketone ( alkanone). The numbering of parent chain of four `C'`s should start from the end closer to the carbonyl group:
`overset(1)CH_(3)-underset("3-Methylbutan-2-one")(underset(O)underset(||)overset(2)Coverset(3)-underset(CH_(3))underset(|)(CH)overset(4)-CH_(3)`