Question:

In callus culture, shoots can be induced by the supply of:

Auxin and no cytokinin

Higher concentration of cytokinin and lower concentration of auxin

Higher concentration of auxin and lower concentration of cytokinin

Both auxin and cytokinin in equal amounts

Solution:

Cytokinins are the plant growth hormones that promote cell division in shoot apical meristem while auxins promote the formation of lateral and adventitious roots. So, shoots can be induced by the supply of higher concentration of cytokinin and lower concentration of auxin. So, the correct option is C.