A) auxins
B) ethylene
C) cytokinin
D) gibberellins
Correct Answer: C
Solution :
Skoog (1954-1956) observed that coconut milk contained a substance, which stimulated cell division. The substance was later on called cytokinin. The most widely occurring cytokinin in plants is isopentanyladenine (IPA), IPA has been isolated from Pseudomonas tumefaciens.
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