Which of the following is correct option:
(i) Auxin help to initiate rooting in stem cutting
(ii) Ethylene promotes root growth
(iii) Ethylene helps leaves/ lower parts of the shoot to remain above water.
(iv) IAA and IBA are synthetic auxin
1
i, ii and iii only
2
i and ii only
3
i, iii and iv only
4
All of these