Choose the correct answer from the alternatives given.
Abscisic acid was discovered in

1881

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1928

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1961

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1999

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Solution

The correct option is C 1961
In 1963, abscisic acid was first identified and characterized by Frederick Addicott and his associates. They were studying compounds responsible for the abscission of fruits (cotton). Two compounds were isolated and called abscisin I and abscisin II. Abscisin II is presently called abscisic acid (ABA)(Addicot, 1963).
So, the correct option is '1961'.

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