Differentiation of shoot is controlled by
(a) high auxin : cytokinin ratio
(b) high cytokinin : auxin ratio
(c) high gibberellin : auxin ration
(d) high gibberellin : cytokinin ratio.
(a) high auxin : cytokinin ratio
(b) high cytokinin : auxin ratio
(c) high gibberellin : auxin ration
(d) high gibberellin : cytokinin ratio.