The correct option is D Indole-3-acetic acid and indole butyric acid
Indole - 3 acetic acid and indole butyric acid are the synthetic plant hormones which are important in tea plantation. Indole-3-acetic acid and indole butyric acid are two different forms of synthetic auxin, which promotes the rooting, when mixed with a proportion of 1.0mg per litre in MS media. These synthetic hormones had also found to have multiple effects like the development of adventitious roots in tea plants.