What is the $IUPAC$ name for isophthalic acid?

Which of the following is not correctly matched?

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 will be the $IUPAC$ name of the given compound $CH_3-CH(CH_2-CH_3)-CH(CH_3)-CH_2-CH(CH_2-CH_3)-CH_3$?

State True or False for the following statements:
$(i)$ Molecular formula of Anisole: $C_6H_5OCH_3$.
$(ii)$ Acetone is a common name of $CH_3COCH_3$.
$(iii)$ Molecular formula of benzene is $C_6H_6$.
$(iv)$ Formula of $C_2H_6$ is methane.
$(v)$ The formula of pentane and propane are $C_5H_{12}$ and $C_3H_8$ respectively.

What is the correct $IUPAC$ name of the given compound?