Which of the following phytohormones is most commonly used in a crop plant whose terminal buds are modified into tendrils to increase the production of its fruits?

Terminal bud of grapevine is modified into tendril. It is an aerial stem modification. In vine plantations, Gibberellins are used to increase the number of inflorescences, number of flowers in each inflorescence, increasing the length of fruit stalk to keep the fruits away from each other, forming seedless fruits, increasing the size of fruit and sugar content of the fruit.