Which one is paired incorrectly?

Options

A. Auxin - Isolated from human urine
B. Zeatin - Isolated from corn kernels and coconut milk
C. Gibberellins - Isolated from fungus G. fujikori
D. Abscisic acid - Isolated from ripened oranges

Answer

D

Explanation

Kogl et al. (1931) isolated auxin from human urine called heteroauxin which was identified as indole-3-acetic acid (I A A). Zeatin is a cytokinin-like substance isolated and crystallised by Letham (1963-65) from milky endosperm of corn (Zea mays). It also occurs in coconut milk.
Yabuta and Sumiki (1938) isolated a chemical substance from the cultural filtrate of fungus Gibberella fujikurol in crystalline form and named it gibberellic acid.
Cousins (1910) found that ripe oranges produced a volatile substance that hastened ripening of unriped bananas nearby. with the help of gas chromatography, R. Gane (1934) found that the ripening causing volatile substance was ethylene.