Which plant hormone hastens early rooting in cuttings during vegetative propagation?

Phototropic curvature is the result of uneven distribution of

Which one among the following chemicals is used for causing defoliation of forest trees?

Which of the following is $NOT$ an effect of auxin?

What happens when auxin is applied to the tip of a cut stump?

$A$: If a plant is kept horizontally,auxin accumulates on the lower surface.
$R$: Displacement of statoliths and other cell organelles to the lower surface modifies the translocation pattern of auxin.