How many of the following are natural PGRs occurring in plants?
IAA, NAA, GA₃, Zeatin, Kinetin, Ethylene, Ethephon, ABA

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answer is C.

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Detailed Solution

IAA is naturally obtained from plants. NAA is synthetic auxin. GA₃, zeatin, ethylene, ABA are naturally present in plant body. Kinetin is a synthetic hormone.

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