Ownclasses

One of the synthetic auxins is

  • NAA

  • IAA

  • GA

  • IBA

Answer

A.

NAA

The term auxin is applied to the indole -3-acetic acid (IAA) and to other natural and synthetic compounds having certain growth regulating properties.
NAA (Naphthalene Acetic Acid) and 2-4-D (2-4 dichlorophenoxy acetic acid) are synthetic auxins. 
IAA and IBA  (Indole Butyric acid) have been isolated from plants. All these auxins have been used extensively in agricultural and horticultural practices.

The term auxin is applied to the indole -3-acetic acid (IAA) and to other natural and synthetic compounds having certain growth regulating properties.
NAA (Naphthalene Acetic Acid) and 2-4-D (2-4 dichlorophenoxy acetic acid) are synthetic auxins. 
IAA and IBA  (Indole Butyric acid) have been isolated from plants. All these auxins have been used extensively in agricultural and horticultural practices.