Which among the following are auxins?

Which among the following are auxins?
  1. IAA, IBA, CK
  2. $\mathrm{GA}_3, 2,4-\mathrm{D}, \mathrm{IAA}$
  3. IAA, IBA, NAA
  4. $2,4-\mathrm{D}, \mathrm{IAA}, \mathrm{ABA}$

Solution

IAA is Indole 3 acetic acid is universal natural auxin. IBA is indole 3 butyric acid with auxin like activity. It is both naturally occurring and synthetically prepared. NAA is napthalene acetic acid which is a synthetic auxin.

Asked in: NEET 2008 (Screening)

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