Correct Answer - A::D
`underset("Monochloroderivatives of n-butane")(CH_(3)-CH_(2)-overset(Cl)overset(|)(C )H-CH_(3) " " CH_(3)-CH_(2)-CH_(2)-CH_(2)Cl)`
`underset("Monochloroderivatives of 2-methylpropane")(CH_(3)-overset(CH_(3))overset("| ")underset(Cl)underset("| ")("C ")-CH_(3) " " CH_(3)-overset(CH_(3))overset("| ")("C ")H-CH_(2)-Cl)`