Which of the following statements are true regarding the composition of state legislative councils?

(i) One-third shall be elected by electorates consisting of members of municipalities, district boards, and such other local authorities in the State.

(ii) One-twelfth shall be elected by electorates consisting of persons who have been engaged in teaching in educational institutions.

(iii) One-twelfth shall be elected by electorates consisting of persons residing in the State who have been graduates of any university.

(iv) One-third shall be elected by members of the Legislative Assembly of the State.