Rajesh noticed that a potted plant kept in the window of his room shows bending towards sunlight. This could be due to:
(a) More growth in the well lit region due to diffusion of auxin hormone
(b) More growth in the region away from light due to diffusion of auxin hormone
(c) More growth in the well lit region due to diffusion of cytokinin hormone
(d) More growth in the region away from light due to diffusion of cytokinin hormone