N6-furfuryl amino purine, 2, 4-dichlorophenoxy acetic acid and indole-3 acetic acid are examples respectively for
1
Synthetic auxin, kinetin and natural auxin
2
Gibberellin, natural auxin and kinetin.
3
Natural auxin, kinetin and synthetic auxin.
4
Kinetin, synthetic auxin and natural auxin