Are produced in growing areas, such as meristems at the tip of the shoot.
1.auxins
2.gibberellins
3.cytokinins
4.none of the above

CYOKININS is the correct option. Cytokinins is one of the types of plant hormones and it is usually produced in the root apical meristem, that is, at the very tip of the root. The hormone delays aging in plants and it also involve in repair of wounded plant parts.

1.989×10^30 kg is the weight of the sun.