Phytohormones are used in:

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(D) Phytohormones (plant growth regulators) have various applications in agriculture and horticulture:$1$. Parthenocarpy: Auxins and gibberellins are

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All the above

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(D) Phytohormones (plant growth regulators) have various applications in agriculture and horticulture:$1$. Parthenocarpy: Auxins and gibberellins are used to induce the development of seedless fruits without fertilization.$2$. Grafting: Auxins are often applied to the cut surfaces of scions to promote root initiation and successful union.$3$. Ripening of fruits: Ethylene is widely used to accelerate the ripening process in climacteric fruits like bananas and mangoes.Therefore,all the mentioned processes utilize phytohormones.

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