The $IUPAC$ name of $(CH_3)_3C-CH=CH_2$ is

Which of the following $IUPAC$ names is correct for the structure:
$CH_3-CH(CH_3)-CH_2-CH_2-CH_2-CH(CH_2-CH_2-CH_3)-CH_2-CH_3$?
$(i)$ $2-$methyl$-6-$ethylnonane
$(ii)$ $6-$ethyl$-2-$methylnonane
$(iii)$ $4-$ethyl$-8-$methylnonane

What is the $IUPAC$ name of the compound $CH_3 CH = CH - C \equiv CH$?

The $IUPAC$ name of succinic acid is

Match the structures given in Column-$I$ with their $\text{IUPAC}$ names in Column-$II$.
| Column-$I$ (Structure) | Column-$II$ ($\text{IUPAC}$ Name) |
| :--- | :--- |
| $(A)$ Cyclohexanol | $(i)$ $2$-ethoxy-$1,1$-dimethylcyclohexane |
| $(B)$ $2$-methylcyclopentanol | (ii) $3$-methylphenol |
| $(C)$ $3$-methylphenol | (iii) Trihydroxybenzene |
| $(D)$ $1$-ethoxy-$2,2$-dimethylcyclohexane | (iv) $2$-methylcyclopentanol |
| $(E)$ Benzene-$1,2,4$-triol | $(v)$ Cyclohexanol |
| | (vi) Benzene-$1,2,4$-triol |

The correct $IUPAC$ name of the compound $CH_3-CH_2-C(=O)-CH(CN)-CHO$ is: