Which of the following movement is not related to auxin level

Options

A. Bending of shoot towards light
B. Movement of root towards soil
C. Nyctinastic leaf movements
D. Movement of sunflower head tracking the sun

Answer

C

Explanation

Phototropic movements, e.g. bending of shoot toward light, movement of sunflower head tracking the sun, etc. and geotropic movement, e.g. movement of root towards soil are mediated through differential distribution of IAA
Nyctinastic leaf movements are affected by diurnal variation of light intensity and temperature, such as elliptical up and down movement of the two lateral leaflet