The application of synthetic plant hormone like IAA, IBA and NAA are best described as:-
(a) prevent early fruit fall before harvesting and is used to produce parthenocarpic fruit
(b) prevent early fruit fall only
(c) to produce both seed less fruits and fruits with seeds
(d) to produce larger fruit
Indole acetic acid, indole butyric acid and napthalene acetic acids, are synthetic auxins. These synthetic auxin are used to prevent pre fall of fruit. 2, 4-D is used in apple and and orange NAA is used in tomatoes. The application of these synthetic auxin on unpollinated pistils develops them into parthenocarpic fruits.