Explanation:
According to Bronsted-Lowry an acid is defined as the specie which is able to donate hydrogen ions when dissolved in water.
For example, [tex]HCl \rightarrow H^{+} + Cl^{-}[/tex]
On the other hand, bases are the species which are able to donate hydroxide ions when dissolved in water.
For example, [tex]NaOH \rightarrow Na^{+} + OH^{-}[/tex]
In [tex]CH_{3}CH_{2}OH[/tex] compound, when it will lose hydrogen ion then it will result in the formation of a [tex]CH_{3}CH_{2}O^{-}[/tex] (alkoxide ion). As the carbon atoms are donating their positive charge towards the [tex]O^{-}[/tex] ion so, it will become unstable in nature.
As a result, it will neither give a hydrogen ion or a hydroxide ion.
In [tex]CH_{3}CH_{2}CH_{2}CH_{3}[/tex], there is no difference in the electronegativity of both carbon and hydrogen atoms. Therefore, this compound is not polar in nature hence, it will neither give a hydrogen or hydroxide ion.
In [tex]CH_{3}CO_{2}CH_{3}[/tex] there is presence of no -OH group. Hence, it will neither give a hydroxide or hydrogen ion.
Thus, we can conclude that none of the given compounds will act as an acid or a base.