6- furfuryl ammino purine 2, 4- dichorophenoxy acetic acid and indole -3 - acetic acid are examples respectively for
A. Synthetic auxin, kinetin and natural auxin
B. Gibberellin, natural auxin and kinetin and synthetic auxin
C. Natural auxin, kinetin and synthetic auxin
D. Kinetin, synthetic auxin and natural auxin.