A) ABA
B) Auxin
C) Cytokinin
D) Gibberellin
Correct Answer: C
Solution :
Cytokinin is a plant cells division hormone. It brings about the process of cell division i.e., cytokinesis in plant cells. Cytokinin is widely used in various tissue culture mediums with the particular ratio of auxin hormone. Higher cytokinin to auxin ratio leads to shoot formation while higher auxin to cytokinin ratio leads to root formation. But when auxin and cytokinin occurs in equal amount then callus formation takes place.
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