The `IUPAC` name of `CH_(3)COCH(CH_(3))_(2)` is

Options

A. (1) `2`-methylbutan-`3`-one
B. (2) `4`-methylisopropyl ketone
C. (3) `3`-methylbutan-`2`-one
D. (4) Isopropyl methyl ketone

Answer

C

Explanation

The compound is a branched ketone, i.e., it is an alkanone. The numbering of the parent chain should be done so as to guve the lowest possible number to the `C` to the group:
`overset(1)(CH_(3))-overset(O)overset(2||)(C)-overset(CH_(3))overset(|)(.^(3)CH)-overset(4)(CH_(3))`
Its common name is isopropyl methyl ketone.