The `IUPAC` name of the compound
`CH_(3)-underset(CH_(3))underset(|)(C)-underset(CH_(2))underset(||)(C)-CH_(2)-CH_(3)`
is

Options

A. (1) `2`-ehtyl-`3`-methylbut-`1`-ene
B. (2) `2`-Isopropylbut-`1`-ene
C. (3) `2`-methyl-`3`-ethylbut-`3`-ene
D. (4) `2`-(1-methylethyl)but-`1`-ene

Answer

A

Explanation

It is a branched alkene. Select the longest possible continuous `C` chain containing the `C=C` bond and carrying the maximum number of side chains:
`overset(4)(CH_(3))-underset(2-"Ethyl-3-methylbut-1-ene")(underset(CH_(3))underset(|)overset(3)(CH)-underset(.^(1)CH_(2))underset(||)overset(2)(C)-CH_(2)CH_(3))`