Which of the following is basic in nature?

Which of the following are basic in nature-

Which of the following is most basic in nature ?

Electronegativity is defined as attracting power of sharing pair of electron between covalently bonded atoms. Electronegativity is defined on different scales, F has height electronegativity between all elements. Which of the following oxide is basic in nature ?

Which of the following oxides is basic in nature?

Which of the following regarding basic nature of amine is correct

Which of the following is basically responsible for acidic nature of phenols ?

Amongest the following the most basic in nature is